Natal 1857 1/- Buff Embossed on Part Entire to Hamburg, Cert

1857 1/- buff, embossed (SG 7). A fully-sized example tied to large part entire addressed to Hamburg. Stamp tied by Pietermaritzburg oval in black. Exceptional embossing with value standing very clear. Arrival mark on reverse. An exceedingly rare stamp in any representation, only 11 complete covers with 1/- frankings recorded. Photo-cert: Eichele BPB states "Even as a part cover of the 1/- because of its destination of key piece status".. (cv£8500). See additional images incl certificate & full cover.