Issued by the SUPERTEST GASOLINE COMPANY., of Canada., as premium when you filled up with gas at their Service stations during 1952 (I know this date to be correct as I have seen a Canadian Newspaper from 1952 with a Supertest Ad that mentions the cards being available and to collect them all.) Burdick lists this series as UOC2 in his American Card Catalogue. These cards were, "issued weekly with compliments of your neighborhood Supertest Service Station Dealer",. There are 15 jet planes in the series. It was issued with French Language Backs (exclusive to the Province of Quebec and I have found slightly scarcer to come across) as well as the English Version. The card features a black and white image of the Features plane with the back giving a brief description of the plane, including it's manufactures and primary uses.

the-seeker-kid