A Zeiss IIa Compound Microscope

German, c.1890, engraved 'Carl Zeiss Jena No. 37534', microscope on 'Y' shaped base with plano-concave mirror, with Abbe substage illuminating apparatus, rotating stage, triple nosepiece, with 4 Zeiss objectives, 5 eyepieces all in fitted French polished mahogany case with leather outer case