This postcard shows Russian (Soviet) stamps and is titled "Sport on stamps." Some of these are Olympic stamps, and some commemorate other sporting events. The easiest ones to identify are the ones commemorating the Sapporo (САППОРО ) 1972 Winter Olympics. Five stamps were issued for that Olympics. The sports shown are speed skating, figure skating, hockey, ski jumping, and cross country skiing.
Many stamps were issued for the Moscow 1980 Olympics. One of them is the stamp on the lower right with the green border and magenta hurdler. To the left of that stamp is a stamp commemorating the 1974 Moscow Modern Pentathlon World Championship.
This is a post for Sunday Stamps at Viridian's Postcard Blog