Gundlach Optical Company remained in Rochester and continued to make Gundlach microscopes into the 20th century. However, Gundlach's exact relationship to this company is unclear. Ernst Gundlach returned to Germany around 1900. Gundlach's Physician's Microscope No. A screw-thread coarse focus, parallel spring fine focus, swinging substage.
Roller guide fine focus mechanism, glass stage plate, detachable object carrier, etc.
A triplet correction lens to be used in eyepieces.