Great Britain 1885 5d dull green Cover St. Johns Wood to Thayetmyo Burma

Cover franked with 5d dull green, paying the single rate to Thayetmyo, Burma, endorsed "B. Burmah" at top, postmarked with clar St. Johns Wood "41/B" duplex (May 29), equally crisp receiver strike of Thayetmyo at lower left (July 8), with Sea Post Office transit c.d.s. on reverse (June 4), a choice cover to a desirable destination.