BUEA, Form stamp, 3 pieces with different postmark types, 10 Pfg imperial yacht with violet stamp "Buea (Cameroon) " on piece, registered cover with rare stamp in black on registration label on registered cover with British occupation 10 Pfg, vertical pair, and 20 Pfg, horizontal strip of four to Ennenda / Switzerland as well black "BUEA (Cameroon) as additional cancellation on picture postcard with 5 Pfg imperial yacht from "BUEA 30 / 10 08", very scarce pieces of evidence of the form cancel, the seeming only provisionally on postal pieces was used, two pieces expertized Pauligk