An intriguing hand-held analytical calculating apparatus, English, circa 1890,
Lot 88
An intriguing hand-held analytical calculating apparatus, English, circa 1890,
Sold for £312 (US$ 526) inc. premium
Lot Details
An intriguing hand-held analytical calculating apparatus, English, circa 1890,
comprising main brass core bar with bridged reading scale incised with Roman numerals up to XVIII, the 18 boxwood discs stamped ordering from 2 to 9, each with locking pin-face to engage with neighbouring disk, constant sprung-loading pressure from slot in the core - 4.3/8in. (11cm) long, each disc diameter .13/16in. (2.1cm)
Activities
Contacts
  1. Jon Baddeley
    Specialist - Scientific Instruments
    Bonhams
    Work
    Montpelier Street
    London, SW7 1HH
    United Kingdom
    Work 0207 393 3872
    FaxFax: +44 20 7393 3873