Circular micrometer for Microscope by Ross?, English, c. 1850-75

Subject: Microscopy
Item type: Object
Makers: ? Ross
Provenance: Not ascertained. Probably belongs with Ross micr. Bl. 100.
Primary inscriptions: Compressor signed "Ross, London". Micrometer signed "Georges Oberhaeuser, Paris."
Physical material: Brass
Dimensions: Height: 100mm Width: 22mm Depth: 32mm Weight: 112g
Inventory No: 35854

Description

Circular micrometre.