X and Y movements are controlled by two separate screws with milled heads. This microscope is fitted with a circular rotating stage which, in turn, is fitted with a standard X–Y mechanical slide holder. It is therefore a little over 20 years later than the second instrument shown below. The serial number places the production of this instrument in the early years of the 1920’s – most likely 1922/1923. Serial numbers The standard Jug Handle microscope: Stand number 82246 The two instruments are illustrated below.
The former is a “standard Jug Handle”, whilst the earlier stand is one of the rarer “Photo-micrographic” stands.
One was produced in the early 1920’s and the other at the very end of the 19th century. This short paper has been written with the purpose of comparing two Zeiss “Jug Handle” microscopes, which I have in my possession. Home | Resources | Articles | Zeiss “jug handle” microscopes Zeiss “jug handle” microscopes By Tony Jarratt Bulletin of the Quekett Microscopical Club.In any case, the number will not be a official Zeiss serial - it either is a fragment, or something entirely different. Or it might be from the immediate post-war period, when some laid-off Zeiss employees were assembling lenses at home from parts taken from the shelled out factories, to swap or sell on the black market.
With that odd mix of typographies I suspect a late wartime product, when production had been relocated to other companies and underground facilities, utilizing whatever tools were at hand. It won't be late GDR either - while Zeiss Jena restarted their numbering some time after the late seventies, the (presumably TGL standard font) engravings on any of my late Tessars from that period look very different and more modern. So this will not be a early lens (unless it was re-engraved by a repair man when replacing a worn flange). as a abbreviation for number places that lens after 1933 (or at whatever point after that Latin abbreviations in science and engineering were banned).
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