CAMP P.O. No.4: 1905 India 1a on 2a6p postal stationery envelope cancelled by “CAMP P.O. No. 4” 6 MA 05, sent to Poona with fine arrival bs, very fine and rare, ex Parsons
Note: The Seistan Arbitration Commission was established to demarcate the boundary between Persia and Afghanistan in the vicinity of Seistan. A post office unit served the commission using this canceller between Feb 1903 and June 1905.