Two circular micrometers (mm in 500 and cm in 100), engraved "Georges Oberhauser, Paris" Two circular micrometers (mm in 500 and cm in 100)
Workshop micrometer for the blind (no. 412/62), by Moore and Wright, Sheffield, South Yorkshire, England, 1950-1952. The Workshop micrometer for the blind (no. 412/62) is a standard micrometer, modified by the addition of an aluminium drum of geared serrated discs with braille characters: developed in 1951, in conjunction with the National Institute for the Blind. Workshop micrometer for the blind (no. 412/62) 1950-1952
Objective split-lens micrometer (heliometer) by Peter Dollond for 4 3/8-inch aperture reflecting telescope by James Short, London, 1763-1765. micrometer
James Cocker's patent decimal gauge (micrometer) from his original patent of 1857 no. 1680, modified by Messrs. Joseph Whitworth and Co. to gauge 0 to 2 inches reading to thousandths of an inch (Whitworth Works no. 119) James Cocker's patent decimal gauge (micrometer) from his original patent of 1857 no. 1680 earliest 1857
A pocket micrometer , range 0" to 1" made by Moore and Wright 1961; with friction clutch and a vernier scale, stored in a protective case. pocket micrometer with vernier scale 1961