The two on the left side are embossed with C3H (HEMAH) from Belarus, the two on the right are embossed with JSN (J Stolle Niemen) from Poland - all produced at the same glassworks, just that the national borders were moved as a result of WWII and Soviet Hegemony.

The Hemahs are in green and cobalt blue glass, the Niemens are dark cornflower blue to peacock blue.

The cobalt blue HEMAH has a somewhat more flared skirt than its JSN counterpart.