Some history and a database of antique tennis balls and containers – tenniscans.com
Pennsylvania Rubber Company
United States of America
Hard to find
Olive drab can with paper label showing information that is normally printed on the can. Stock No. 37-B-1975 TENNIS BALLS 3 BALLS PENNSYLVANIA RUBBER CO. JEANNETTE, PA. MADE IN U.S.A. PRESSURE PACKED.