The small version of Kellner's microscope. The 79th microscope from his workshop was built 1854 and according to Kellner's accounting records was delivered on 3rd of July 1854 to Prof. Wernher in Gießen. (Probably Adolph Wernher, 1809 - 1883). The price was 50 Taler and 10 Silbergroschen. Cover slips were included with a thickness of 1/12-1/13  inch.
Der Autor möchte anonym bleiben. Er wird im Ticket identitfiziert.
Vom Ersteller persönlich zugesandt.