Getty Museum's Devices of Wonder.

The Getty Museum has a very cool interactive "edutainment" exhibition featuring vintage devices from the wunderkammer (cabinet of curiosities) of 1600s to the 1800s.

This particular one is a French compound microscope c. 1751:

Luxurious microscope like this one were made for wealthy Europeans, who maintained collections of natural specimens in the manner of Renaissance Wunderkabinette (cabinets of wonder). This compound microscope possesses a micrometric stage and an ocular micrometer devised to allow measurement of specimens.

Link (via WFMU Beware of the Blog)