The picture shows a view of all (6) Old Tin Union Pins in this lot. All six are pinbackbuttons. Three are from the same union but different years. They have logo designs and are marked as follows:
TRUCK DRIVERS, WAREHOUSEMEN, & HELPERS UNION 340 A. F. OF L. I. B. OF T. C. W. & H. OF A. SEPT. 1944
TEAMSTERS, CHAUFFEURS, & HELPERS 633 I. B. OF T. C. W. & H. OF A. AFL - CIO SEP 1958
RETAIL CLERKS UNION RCIA AFL - CIO JUNE 1963
N. E. PETROLEUM LABOR ORG. 36 1960
N. E. PETROLEUM LABOR ORG. 36 1963
N. E. PETROLEUM LABOR ORG. 36 1964
To judge the sizes the largest one measures 1" wide. They are in good to near mint condition.