cover 1916 (13 Dec.) from Winnepeg to Nassau and re-addressed back to Winnepeg, bearing Canada 1916 2c. + 1c. in combination with 1916 (May) Special Delivery 5d. (oxidised in places) cancelled by Winnepeg machine d.s. and showing, on reverse, Nassau arrival c.d.s. for the 24th. Rare. B.P.A. Certificate (1991). Photo