Sweden. Facit 138v ★★, 1920 Air Mail Surcharge 50 öre / 4 öre violet with lower sheet margin. Block of four with the overprint in set-off – completely on two stamps and partial on two stamps. Very rare and not mentioned in Facit. Signed Grenstedt.
A buyer’s premium of 25% plus a 20 SEK lot charge is added to the hammer price
