Merkulov issue 4 kopeks red together with DVR overprints 35 kopeks brown and green and 35 on 2 kopeks green perforated and Coat of Arms issue 10 cents blue (17x including a block of 7 and a block of 8) on reverse of registered cover from Vladivostok 5-7-1922 via London to Luzern (Switzerland), faults. Despite the quality a rare combination of the Merkulov issue with 2 different FER issues!