About #3 - 100 mark type 1914
Cameroon. Imperial Government of Cameroon (German occupation). Douala Treasury. 1914 Issues. Date: 12.08.1914. Dimensions: 160 x 105 mm. Watermark: no. Material: paper. No security thread. Printer: unknown. Front and back printing in black on brown paper. Description: texts in German. Decorative frame in black. Background with an imperial eagle in blue or blue green. Numbering in black. Value of 100 mark indicated in the angles. Signature combinations: August Full / Kräuter. Back: texts in German. The note exist cancelled by a cross on the front.