Here we have a Vintage Prehistoric 23 Machairodus Dinosaur Card Hobby Trading Advertising Trade Card 1963. The back says Kit No 382 TWA Boeing 707 Kit. Hobby Trading Post Seaford New York. It is the size of a standard postcard. It is approx. 3" tall x approx 5" wide. It is in good condition. It does have some wear and imperfections. See the photos or more info.