Thailand. (British Consulate - Netherlands East Indies). 1923. Registered Official Mail envelope headed 'On His Britannic Majesty's Service' (with three British Consulate wax seals on reverse), addressed to 'Sourabaya, Java' bearing SG 147, 2s brown and SG 218, 15s blue (4) tied by Bangkok/ 2 date stamp '27th Oct 23' with matching registered label, routed via Singapore.
Lovely item paying the scarce eighty two satang rate.
(Roughly opened at left).