Rhodesia SG126 2d black and grey on a Front to London Bulawayo Pmk

Rhodesia 1910-13 Double Head Issue Perforated 14 Two Pence 2d. black and grey used and tied to envelope front to London by Bulawayo c.d.s. Ex Mike Rolfe. (The RSC number is from the detailed listings which are available free of charge on the website. Ebay wont let me give a link but just search for the rhodesianstudycircle.)