This unsigned instrument
turned up at an estate sale in Illinois. The
microscope bears an number of features that strongly
suggest that it is American made. In particular, the
maker has borrowed ideas incorporated in the post-1876
microscopes made by Joseph Zentmayer of Philadelphia.
These include the swinging sub-stage, rotation of the
body above the tripod base, and the lever mechanism of
the fine focus adjustment. However, the quality of the
construction is not of the same caliber as found on
Zentmayer microscopes or those of the other established
makers suggesting that this is the work of an amateur
with some talent.