Natal 1856 Pmburg Stampless Letter Wrapper to Cape Town

1856 Blue folded letter wrapper to "The Postmaster General, Cape Town" bearing at top right a part strike of the rare oval "POST OFFICE / P.M.BURG" handstamp (Hart A1). Superb Cape Town arrival oval SP 8 in red on reverse. A rare marking in the pre-stamp period, seldom seen. Fresh. See additional image below.