Serial number: 231926 Production date: 1925
Serial number: 163333 Production date: 1915
Serial number: 57032 Production date: 1901
Serial number: 62611 Production date: 1901
Serial number: 23xxx Production date: 1876/1877
Serial number: geen Production date: 1925
Serial number: geen Production date: 1887
Serial number: 11797 Production date: ca 1920
Serial number:43696 Production date: ca 1930
Serial number:83444 Production date: 1939
Serial number: nog zoeken Production date: 1895
Serial number: 55251 Production date: 1900
Serial number: 5767 Production date: ca1888
Serial number: ------ Production date: 1907
Serial number: 28994 Production date: 1897
Seibert in Wetzlar Samengesteld
Serial number: 9435 Production date: 1900
Seibert petrografische microscoop
Serial number: 16604 Production date:ca 1920
E.Leitz Wetzlar Petrografische Microscoop model CM
Serial number: 111952 Production date:ca 1908
