Cameroon 1915 4d on 40pf black and carmine Surcharge error, SGB7bCameroon 1915 4d on 40pf black and carmine, SURCHARGE TRIPLE, TWO ALBINO, SGB7b. A fine unmounted mint example with full original gum. A very rare surcharge error as only one left half sheet of 50 originally existed and fewer surviving examples. The albino impressions at the top of the stamp, with the three sets of stops are very clear on the reverse. A quite spectacular quality example of an interesting surcharge error of the "Cameroon Expeditionary