167x silver

Magnification 167x | Aperture in plates 1.06 mm
Body plates 45 mm x 25 mm | Pitch of main positioning screw 0.66 mm

This microscope is #9 in van Zuylen and Bracegirdle. His Beads of Glass notes (p. 34) that in 1906, this microscope, the 112x brass microscope, and a second silver (now lost) came to the Deutsches Museum, Munich, from "the instrument-maker Filbri of the Physical Laboratory of Utrecht University, instead of the copies that had been ordered. They were sold at a price much less than that which Filbri used to charge for copies."

It has rectangular (untapered) body plates with six rivets. It differs from the others in several ways.

Looking at the pin-side view, the specimen pin and focusing screw are to the left instead of on the right.

The focusing screw is longer and is at an acute angle to the body plates instead of perpendicular to them.

The specimen pin is angled toward the lens instead of perpendicular to the mount.

The mount is a thin wedge, tapered on the sides, instead of a solid rectangle. It alone of all the mounts has no other decorative feature.

Perhaps Leeuwenhoek was experimenting variations on his design theme. Perhaps the specimen he had in mind for this lens was better observed with this arrangement.