cover 1856 XU5 (opened-out) to Calcutta bearing ½a. Die I (cut close) lightly cancelled "B/156" and showing, on reverse, a very fine strike of the extremely rare "RANGOON/POST OFFICE/R.H./NO 1" double-ring h.s. in red with "RANGOON/P.O." and arrival c.d.s. adjacent. Ex Dahlmann. Photo.