Lot 1173

1957 a pair of "45 Years of Selenge Aimag" illustrative covers, one commerically used and one only with blue and yellow colour printing. Probably progressive proof or semi-finish product.

1957年一對“色楞格省四十五迼年”美術封，一件實寄，一件僅帶藍色及黃色套印，可能為分色校樣或半製成品。