CAMEROON. Kais Gouvernment von Kamerun. 5 Mark, 1914. P-1a. German Kamerun. PMG About Uncirculated 50.Duala. A low 362 serial number found on this German Kamerun 1914 5 Mark. The note is rarely available and when it is, usually it is not nearly as nice as this example. Just a few hints of circulation, but free of any major distractions.