Hi, I am after any Azemar Experimental Cancellation material. In particular, any example of the cancellation on a SG 51/52 1 1/2d Rose/Lake Red. Also, an example of the January 1871 cancel on postal stationery. However, anything considered. Thank you

Does anyone have any photograph, impression or drawing of the Azemar cancellation machine? If not of the Azemar machine, the Hoster cancellation machine, which was based on the Azemar? On the same subject, does anyone have any photograph of the German inventors, Carl Fischer and Johann Carl Wilhelm ...