1900 O.H.M.S. cover to Durban with a V.R.I. 1d cancelled BLOEMFONTEIN DE 6 00. The cover has a PASSED CENSOR h/s on the front as well as a straight line IMPERIAL MILITARY RAILWAYS h/s and a violet triple oval Imperial Military Railways, Bloemfontein, Office of the / District Engineer / No. 1, / 6 DEC 1900 cachet. (This cover illustrated in the Batten Post Marks of the O.F.S book) A light central vertical crease – as often found on long covers – does not detract. Uncommon.