Each is a real photo without dot screen, with 26 in gold, one in silver and one in cream. Each is cello covered front whose edges are wrapped around a white plastic reverse with 1" vertical stickpin. All text is Russian. Consignor was told these 28 comprise complete set of 1st and 2nd Regiment Russian Cosmonauts,  but we cannot verify that and offer the group as simply 28 different. The only one we can positively identify is the first woman in space on first button in Row 1. This is Valentina Tereshkova who launched in Vostok 6 on June 16,1963. Row 4 #3 has minor scuff in reflected light but all else are Exc. to Mint. All are scarce, if not rare,  in USA as we've seen only a few examples in our 50 years.