NATIONAL LABOR RELATIONS BOARD

VII. PRINCIPLES ESTABLISHED 177
It is also true that the absence of interchange between groups tends
to indicate the inadvisibility of including such groups in one unit.°2
The maintenance of a single seniority roster for different groups
of employees has been considered by the Board to indicate the propriety
of including such employees in one unit. In Matter of Fi8her
Body Corporation, 63 the Board held that four divisions of one company
constituted one unit. It pointed out that there had been
transfers of employees between two of the divisions without loss of
seniority, and, with regard to one of these divisions and the other
two, that:
* * * From time to time employees are transferred between these divisions
without loss of seniority. Employees at Chevrolet 69th Avenue have
greater seniority than employees at Chevrolet 107th Avenue. At times of lay-off,
Chevrolet 69th Avenue employees, because of their greater seniority, take the
places of Chevrolet 107th Avenue employees. Similarly, Chevrolet 107th Avenue
employees supplant Parts Division employees.'
The classification of certain types of workers has come so often
before the Board that they can be considered separately. The manner
in which the Board has dealt with watchmen, clerical employees,
technical employees, and similar groups is discussed below in section
G3 (E).
(B) WAGES AND OTHER WORKING CONDITIONS
The fact that various employees are paid at the same rate, and
that their working conditions are much the same tends to indicate
that they constitute a single unit.° 5 Conversely, a substantial differ-
A. F. of L. Federal Union No. 21164, 5 N. L. R. B. 768; Matter of Columbia Broadcasting
Sgstem, Inc. and American Radio Telegraphists Association, 6 N. L. It. B. 166; Matter of
U. A. Lund Company and Novelty Workers Union, Local 1866 (A. F. of L.) successor,
6 N. L. R. B. 423; Matter of Aluminum Company of America and Its 1Vholly Owned Subsidiaries,
etc., and International Union Aluminum Workers of America, 6 N. L. R. B. 444;
Matter of Phelps Dodge Corporation United Verde Branch and International Association
of Machinists, Local 223, at al., 6 N. L. R. B. 624; Matter of Tennessee Electric Power
Company and International Brotherhood of Electrical Workers, 7 N. L. R. B. 24; Matter of
Art Crayon Company, Inc., and its affiliated chmpany, American Artists Color Worke, Inc.,
and United Artists Supply Workers, 7 N. L. R. B. 102; and Matter of Fisher Body Corporation
and United Automobile Workers of America, Local 76,7 N. L. R. B. 1083.
02 Matter of Suburban Lumber Company and International Brotherhood of Teamsters.
Chauffeurs, Stablemen and Helpers of America, Local Union No. 676, 3 N. L. R. B. 194;
Matter of Great Lakes Engineering Works and Detroit Metal Trades Council, 3 N. L. R. B.
825; Matter of S. Blechman of Sons, Inc., and United Wholesale Employees of New York,
Local 65 '
Textile Workers Organizing Committee—Committee for Industrial (Organization,
4 N. L. R. B. 15; Matter of Waterbury Clock Company and International Association of
Machinists, 4 N. L. R. B. 120; Matter of Pittsburgh Plate Glass Company and Federation
of Flat Glass Workers of America, 4 N. L. R. B. 193; Matter of National Motor Bearing
Company and International Union, United Automobile Workers of America, Local No. 76,
5 N. L. R. B. 409; and Matter of Armour of Company and International Association oi
Machinists, Local 92, 5 N. L. R. B. 535.
(2 Matter of Fisher Body Corporation and United Automobile Workers of America, Local 76,
7 N. L. R. B. 1083.
04 See also : Matter of Tennessee Copper Company and A. F. of L. Federal Union No.
21164, 5 N. L. R. B. 768.
es Matter of Huth of James Shoe Mfg. Company and United Shoe Workers of America.
3 N. L. R. B. 220; Matter of Bendix Products Corporation and International Union, United
Automobile Workers of America, Bendio Local No. 9, 3 N. L. R. B. 682; Matter of Standard
Oil Company of California and Oil Workers International Union, Local 299, 5 N. L. R. B.
750; Matter of The American Brass Company and The Waterbury Brass Workers' Union,
6 N. L. R. B. 723; Matter of Martin Bros. Box Company and Toledo Industrial Union
Council, 7 N. L. R. B. 88; Matter of Proximity Print Works and Textile Workers
Organizing Committee, 7 N. L. R. B. 803; and Matter of Minnesota Broadcasting Company
Operating IVTCN and Newspaper Guilit of the Twin Cities. Minneapolis and St. Paul,
Local No. a of the American Newspaper Guild, 7 N. L. R. B. 867. In Matter of American
Steel Wire Company and Steel and Wire Workers Protective Association, 5 N. L. R. B.
871, the Board said :
Another fact which points to the desirability of the employer unit is the similarity in hours,
wages and working conditions in all the plants.