The last photo of Zeiss (West Germany) microscope clear glass ring insert (blank for DIY annuli) | phase condenser diaphragm carrier, - Mikroskopteil

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Zeiss (West Germany) microscope clear glass ring insert (blank for DIY annuli) | phase condenser diaphragm carrier, complete insert, clear glass

(Zeiss (West Germany) microscope clear glass ring insert (blank for DIY annuli) | phase condenser diaphragm carrier, complete insert, clear glass)