W. C a r e w H a z l i t t Coinage of the European Continent

Catalogue of European Denominations 219
Byzantine bronze coinage, which circulated in Greece, Asia Minor,
Southern Italy, and Sicily from the 7th to perhaps the loth c. There
were the multiples of 5 (pcntamimmo), 10 (decanummo), 20, 30, and 40,
the last being = follaro or doppio follaro. The respective values are
usually indicated by Roman numerals.
Obole, obolos, obool, the term applied to the half danaro or denier by a
sort of analogy with the ancient Greek standard or division of value.
The moiety of the Carlovingian denier is usually so called. It is more
frequently than otherwise employed from an ignorance of the correct
denomination. Compare, however, Obnlus.
Obolino, a name for an obolo of smaller module. It is
always
questionable how far these terms were sanctioned by authority or by
contemporary usage.
Obolos, a piece of 5 lepta in the modern Greek currency.
Obnlus, and the half, a silver denomination of Hungary under Bela
IV., 1235-70, with the word between two lions' heads. Also the name
expressly conferred on certain pfennigen of 1378 struck by the Margraves
of Moravia at Glatz with I. G\lacensis\ O\biilus\.
The obulus continued
to be the Hungarian unit during centuries, and was = \ denier. 400
went to the Hungarian florin of gold by virtue of the Edict of Buda,
1447.
Ochavo, the halfquarto or cuarto in the Spanish monetary system under
Ferdinand and Isabella (1476-1504) and their successors. The same
name, or octavo, appears to have been identified with the third brass
Roman coins which, in the absence or dearth of other currency, long
passed in Spain and the South of France as an equivalent for the local
money. Whelan mentions that the word is locally corrupted into chavo
or chovy.
*Ochosen, Spanish. The smallest gold coin.
Oertli, a Swiss name for the j gulden, 1 1
7th- 8th c.
Oirt Stuver, an ecclesiastical coin or token. Billon or base silver.
Arnheim.
Oncia, mezza oncia, and quarto di oncia, a silver denomination of the
Knights of St. John at Malta, of the Two Sicilies, and of the Dukes of
Savoy, 1 8th c. Vittorio Amedeo II. (1713-18) had the 2-oncie piece.
The oncia of the Bourbon Kings was coined from the local mines, and
occurs both of thick and widespread module, the former the scarcer,
and of the dates 1733 and 1791. The Maltese oncia, the \ and j,
= were
30, 15, and "j\ tari. The type seems to have been struck only by
Emmanuele Pinto, Grand Master, 1741-73.
Ongaro. See Ungaro.
On-le-vault, the denier blanc of Cambrai = 2 deniers tournois, coined
in 1347 by Jehan Bougier of Arras for the Bishop of Cambrai. The
denier noir of the same coinage was called valtan, which seems to have
an allied sense. They were something which supplied a popular want.