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ROMAN PLUMB BOBS AND OTHER LOOK ALIKE ITEMS

ROMAN PLUMB BOBS AND OTHER LOOK ALIKE ITEMS

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<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong><br />

<strong>AND</strong> <strong>OTHER</strong> <strong>LOOK</strong> <strong>ALIKE</strong> <strong>ITEMS</strong><br />

PRESENTED BY<br />

WOLFGANG RUECKER<br />

AT THE<br />

WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 1


On Ebay and in shops different items are offered as<br />

“<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong>”.<br />

We find<br />

• real plumb bobs<br />

And other tools / pieces like<br />

• loom weights<br />

• sling bullets<br />

• weights<br />

• others<br />

I will try to explain the differences.<br />

The material is copper (bronze), lead, stone (clay,<br />

terracotta).<br />

WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 2


MAP FROM WIKIPEDIA<br />

WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 3


THE OTTOMAN EMPIRE<br />

16/17 th century<br />

WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

MAP FROM WIKIPEDIA<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 4


FROM A ORIGINAL FRENCH DRAWING (UNKNOWN SOURCE)<br />

IN MY COLLECTION “ANTIQUITÈS No. 15“<br />

WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

<strong>ROMAN</strong> SHAPE <strong>ROMAN</strong> SHAPE ?<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 5


WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong><br />

FROM THE COLLECTION OF WR<br />

• LEAD<br />

• 52 x 42 mm<br />

• Found in Hungary<br />

• 580 gr<br />

• BRASS / BRONZE<br />

• 50 x 50 mm<br />

• Found in Hungary<br />

• 350 gr<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 6


WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong><br />

FROM THE COLLECTION OF WR<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 7


BRONZE<br />

273 gr<br />

WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong><br />

FROM THE COLLECTION OF GSCH<br />

BRONZE<br />

35 x 29 mm<br />

116 gr<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 8


WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong><br />

FROM THE COLLECTION OF DB<br />

BRONZE<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 9


BRONZE<br />

WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong><br />

FROM THE COLLECTION OF PG<br />

LEAD<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 10


WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong><br />

FROM THE COLLECTION OF HTSCH<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 11


WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong><br />

FROM THE COLLECTION OF ND<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 12


WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> IN MUSEUMS<br />

COLOGNE, GERMANY<br />

REPRO.<br />

AALEN, GERMANY<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 13


WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> IN MUSEUMS<br />

XANTEN, GERMANY MUSEUM SAALBURG, GERMANY<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 14


WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> IN MUSEUMS<br />

NAPOLI, ITALY<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 15


WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> IN MUSEUMS<br />

SEVILLA<br />

Archaeological Museum<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 16


WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> IN MUSEUMS<br />

BRITISH MUSEUM<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 17


USE OF THE <strong>PLUMB</strong> BOB<br />

• The plumb bobs were used as a single tool by<br />

masons and carpenters or<br />

• In an instrument (like the GROMA or<br />

CHOROBATE) by the surveyors<br />

WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 18


THE GROMA<br />

WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

<strong>ROMAN</strong> SURVEYING INSTRUMENTS<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 19


WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

<strong>ROMAN</strong> SURVEYING INSTRUMENTS<br />

GROMA EICHSTÄTT, GERMANY<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 20


WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

<strong>ROMAN</strong> SURVEYING INSTRUMENTS<br />

CHOROBATE<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 21


WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

<strong>ROMAN</strong> SURVEYING INSTRUMENTS<br />

CHOROBAT REPRODUCTION<br />

MINING MUSEUM BOCHUM,<br />

GERMANY<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 22


OFTEN I AM ASKED BY COLLECTORS ABOUT THIS SHAPE:<br />

IT IS A LOOM WEIGHT<br />

WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

<strong>OTHER</strong> SHAPES OF <strong>ROMAN</strong> TOOLS:<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 23


LOOM WEIGHTS<br />

FOR WEAVING LOOM WEIGHTS WERE USED TO HOLD THE THREAD TIGHT.<br />

THE LOOM WEIGHTS WERE MADE OF TERRACOTTA, CLAY OR LEAD .<br />

THEY HAVE A HORIZONTAL HOLE IN THE TOP TO FIX THEM.<br />

THE SHAPE IS OFTEN PYRAMIDAL.<br />

WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

THE WEIGHTS ARE FIXED ON<br />

A SINGLE THREAD OR ON<br />

THE HORIZONTAL ROD.<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 24


WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

LOOM WEIGHTS<br />

PICTURES FROM EGYPT<br />

(UNKNOWN SOURCE)<br />

WITH LOOM WEIGHTS<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 25


WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

SLING BULLETS<br />

THESE BULLETS USED IN A SLING (WEAPON) BY H<strong>AND</strong> ARE MADE FROM CLAY /<br />

TERRACOTTA OR LEAD <strong>AND</strong> HAVE NO HOLE! MUSEUM EICHSTÄTT, GER<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 26


WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

SPINNING TOOLS<br />

FOR MANUAL SPINNING A SPECIAL SHAPE WITH A<br />

BIG HOLE IN THE MIDDLE WHICH IS USED TO<br />

MAKE THE WOODEN SPINDLE HEAVIER.<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 27


WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

WEIGHT FOR A SCALE<br />

<strong>ROMAN</strong> STEEL YARD <strong>AND</strong> WEIGHT SCALE (UNKNOWN SOURCE)<br />

BRITISH MUSEUM<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 28


WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

REPRODUCTION OF A <strong>ROMAN</strong> <strong>PLUMB</strong> BOB<br />

IN A MUSEUM IN MY HOMETOWN I MET AN ARTIST WHO SELLS REPRODUCTION OF <strong>ROMAN</strong> ARTIFACTS.<br />

I ASKED HIM IF HE COULD MAKE ME SOME <strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong>.<br />

HERE IS THE STORY:<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 29


WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

REPRODUCTION OF A <strong>ROMAN</strong> <strong>PLUMB</strong> BOB<br />

ULRICH MADE A WOODEN (AFRICAN BLACKWOOD) MODEL<br />

IN THE SHAPE OF A PB IN THE MUSEUM IN COLOGNE,GER.<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 30


WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

REPRODUCTION OF A <strong>ROMAN</strong> <strong>PLUMB</strong> BOB<br />

THIS IS THE “FOUNDRY“ WITH ALL THE EQUIPMENT:<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 31


WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

REPRODUCTION OF A <strong>ROMAN</strong> <strong>PLUMB</strong> BOB<br />

THE MOULD WITH THE MODEL.<br />

UPPER <strong>AND</strong> LOWER PART:<br />

SPECIAL CASTING S<strong>AND</strong> WAS USED<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 32


TWO MOULDS<br />

READY WITH A<br />

SPRUE.<br />

WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

REPRODUCTION OF A <strong>ROMAN</strong> <strong>PLUMB</strong> BOB<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 33


REPRODUCTION OF A <strong>ROMAN</strong> <strong>PLUMB</strong> BOB<br />

BRASS + SPECIAL CHEMICALS HEATED TO 1000 + DEGREES CELSIUS<br />

IN A GRAPHITE CRUCIBLE <strong>AND</strong> POURED INTO THE MOULD.<br />

WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 34


WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

REPRODUCTION OF A <strong>ROMAN</strong> <strong>PLUMB</strong> BOB<br />

CASTING OF THE MOLTEN BRONZE<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 35


WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

REPRODUCTION OF A <strong>ROMAN</strong> <strong>PLUMB</strong> BOB<br />

OPENED AFTER ONE HOUR OF COOL DOWN TIME<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 36


WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

REPRODUCTION OF A <strong>ROMAN</strong> <strong>PLUMB</strong> BOB<br />

TAKING OFF THE CASTING S<strong>AND</strong>.<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 37


WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

REPRODUCTION OF A <strong>ROMAN</strong> <strong>PLUMB</strong> BOB<br />

<strong>LOOK</strong>S NOT REALLY LIKE A <strong>PLUMB</strong> BOB.<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 38


WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

REPRODUCTION OF A <strong>ROMAN</strong> <strong>PLUMB</strong> BOB<br />

DIFFERENT STATES OF THE PRODUCT<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 39


WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

REPRODUCTION OF A <strong>ROMAN</strong> <strong>PLUMB</strong> BOB<br />

BRUSHED <strong>AND</strong> POLISHED<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 40


WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

REPRODUCTION OF A <strong>ROMAN</strong> <strong>PLUMB</strong> BOB<br />

HEIGHT: 56 mm / 2 1/6 in<br />

DIAMETER: 60 mm / 2 1/4 in<br />

WEIGHT: 370 gr / 12 oz<br />

READY!<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 41


WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

REPRODUCTION OF A <strong>ROMAN</strong> <strong>PLUMB</strong> BOB<br />

AFTER ONE YEAR HANGING IN THE GARDEN IT BEGAN TO GET A PATINA<br />

READY!<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 42


WOLF RUECKER<br />

plumbbobwolf@t-online.de<br />

www.plumbbobcollectors.info<br />

CONCLUSION<br />

I HOPE THIS INFORMATION HELPS YOU IN BUYING A REAL <strong>ROMAN</strong> <strong>PLUMB</strong> BOB<br />

INSTEAD OF AN <strong>OTHER</strong> ITEM FOR A HIGH PRICE.<br />

• It is not easy to decide if it is a plumb bob or was used as a plumb bob<br />

• For us it is not possible to DATE a plumb bob!<br />

• Sure you can use every piece/weight that hangs on a string as a plumb<br />

bob, but a “born plumb bob” has a special shape and a hole in the top<br />

to fix the line.<br />

The sellers only will make money and so they sell simple weights for<br />

plumb bobs, but IF YOU LIKE IT, BUY IT.<br />

• Unfortunately we can’t ask the tools .<br />

• That would be great <br />

THANK YOU FOR YOUR INTEREST.<br />

<strong>ROMAN</strong> <strong>PLUMB</strong> <strong>BOBS</strong> 43

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