Thailand. (KLM AIR SERVICE TO IRELAND). 1935. Registered Air Mail envelope addressed to Dublin, Ireland bearing SG 256, 15s blue and SG 260, 1b black and blue tied by Bangkok GPO date stamp with matching registration label, endorsed 'Per Dutch (KLM) Plane'.
Lovely item paying the one baht foreign letter rate to Europe and registration fee of 15 satang carried KLM Air Mail to Amsterdam and onward by sea and rail to Ireland.