Czechoslovak Republic, Postal SCR Seal Image & Found by Chasm_norwich.
Found on Banstead Downs, Surrey, 20mm.
SCR ligate, post horn beneath, crimped outer border // 342 / a
From Paul Cannon, "This contains the monogram ČSR standing for Československá Republika ie Czechoslovak Republic which was formed in 1918 after the First World War and the demise of the Austro-Hungarian Empire. The Czechoslovak Republic was in existence between 1918 and 1938. For an identical postal seal see Plomba poštovní."