The case-mounted Simplex model microscope, c. 1910
The Gundlach Manhattan Optical Co. was formed in 1902
by the merger of the Gundlach Optical Co. and the
Manhattan Optical Co. They produced the rather
basic microscope shown here which was called the
"Simplex" model. The main focusing is by push-tube
and the fine focus mechanism utilizes a micrometer
screw that simply tilts the top plate of the
stage. The single objective is divisable and is
marked 2/3 and 1-inch. This model was sold both
as a free-standing version as shown in the above
advertisement and as a case-mounted version as
illustrated by the example in this collection.