In 1959/1962, Argentina issued the Second Heroes and Wealth Series Nacionales.El seal number 604 of 1 Peso. Seen in this stamp ARGENTINA is on the left, which should be on your right.
In 1941, Italy issued a set of stamps: Fraternity and Firearms. Germany-Italy. In the seal number 435 of 50 c. seen in the back two soldiers, one carries his weapon on the right side and one on the left side.
In 1998 the United States Postal Service issued a stamp of 32 c. Sports Ski. It is noted that the skier got two left boots. (The boot buckles closed out on both feet)