Bidspirit auction | Czechoslovakia - Semi – Postal

Czechoslovakia - Semi – Postal issues - 1919, black diagonal overprint ''Posta Ceskoslovenska. 1919'' on Emperor Karl I stamp of 15h dull red, block of four, upper left stamp completely without overprint, while low left one has just a small part of it, full/part of OG, VF, expertized by J. Leseticky, Est. $100-$120, Scott #B7 var