Thailand. (Stamp Dealer Mail). 1912. Registered envelope written from 'The Siam Stamp Co. Bangkok' (with International exchange label on reverse) addressed to 'H.E. Thain, Stamp Dealer, Norfolk, England' bearing SG 146, 28s red-brown tied by Bangkok/ 1 date stamp '21st June 1912' with matching registration label and oval London transit on reverse.
Scarce single franking 'twenty eight' baht on cover.