Lot 51126 – 1893 invalid usage of the first forerunner issue

1893 (March 24) Cover to London bearing 1890-94 5pf and 20pf, each in vertical pair, tied by « KAISERLICH/DEUTSCHE POSTAGENTUR SHANGHAI » cds, and additionally 1886-90 10pf which remained uncancelled (except for three perforations at top) and was not accepted for postage as this issue was valid until 31.1.1891, being framed on three sides by blue pencil to highlight the erroneous usage and consequent tax to apply, paid with British « 2 1/2/F.B. » due marking, framed « T. » at top left; two horizontal creases, one affecting the franking at top, a very rare postage due cover in a most unusual combination franking; ex Max J. Mayer.