THIS AUCTION IS FOR USED VINTAGE CARDS TITLED "TANKER STRIKE 1939, ATLANTIC, GULF, GREAT LAKES, NATIONAL MARITIME UNION OF AMERICA" & “TANKER STRIKE CLEARANCE CARD”

3.5 INCHES TO 4.25 INCHES IN SIZE FOR BOTH

Fold line on green card , otherwise a clean items from 1939.

On April 17, 1939 the National Maritime Union established picket lines outside five of the oil largest terminal facilities in the United States. Date on green card reads April 19, 1939. Date on red clearance card April 24, 1939