A Cuff-type microscope, possibly German, late 18th
An hitherto unrecorded compound microscope, unsigned, possibly of German origin.
Last quarter of 18th century.
Dimension: 14 5/8” (37cm) high overall, mounted in the top of the 6 ½” x 8 ¼” x 3 ¼” (15x21x8cm) fitted mahogany case.
The body tube is 5 7/8” (14.5cm) long x 1 ¾” (4.5cm) diameter and screws into an arm at the top of the pillar; coarse and fine focussing is by a Cuff-type mechanism (sliding block with a clamp screw and long threaded screw connecting the block and the arm holding the body tube) and the 2 ¼” ( 6cm) diam. single-sided mirror (mirror glass modern, brass frame original) is mounted in a plate at the base of the pillar.
Accessories comprise a Bonanni-type spring stage to be screwed into the stage, a small stage mounted bull’s eye condensing lens on articulated arm and one wooden slide (# 4).
The inside of the drawer is covered with 18th century printed paper that recalls German manufacture.
A very rare compound microscope, only another one very similar in a French private coll.
Despite some signs of use, few functional small repairs and the absence of a dust cover, a still handsome and rare model.
A comparison can be made with #132 of the Golub Microscope Coll.
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