Estonia air mail stamp with 10 Marka 1923 overprint on 5 Marka - Päevaleht perf - cert. K.Kokk

Estonia air mail stamp with 10 Marka 1923 overprint on 5 Marka - Päevaleht perf - cert. K.Kokk
10 Marka 1923 MH*, Päevaleht perforation,

sign K.Kokk, Eo Vaher, A.Teetsov

certificate by K.Kokk

strong shift of the overprint to the left. Rare! Sold as seen, no return.