The picture shows all (6) Old Union PinBackButtons in this lot. They are all from different Unions. There are variations in design, but they are very similar. The dates range from the 1930's to the 1980's. In the order pictured they are marked as follows:
A REAL UNION A. F. OF L. V ...- (Morse code "V" for Victory, WorldWar II)
I. U. OF M. & S. W. Of A. CIO SEPT. 1941
BAKERY & SALES DRIVERS OF MERRIMAC VALLEY LOCAL 686 1973
B. L. F. & E. MEMBER ORGANIZED 1873
STEEL WORKERS ORGANIZING COMMITTEE C.I.O. DUES PAID FOR APR. 1938