1920 stampless On Active Service envelope with crest 'Duke of Connaught's Own V11 Rajputs' on the reverse addressed to London. A superb strike of the double circle 'PASSED CENSOR ADEN / No. A 203' stuck in violet, two examples of this censor are known, this being the finer strike. On the reverse3 'BASE OFFICE ADEN I.E.F.' c.d.s. '12 DEC 20'