Archive of Collections



Details and Image



Item#TypeModel No.Model NameMakerCountryMaterialDiameterDateCondition
LOR006Pocket
Type 2
Lord's CalculatorW. WilsonUKNickel-plated brass"2-1/2"c. 1895-1915?
C5

Notes: Fixed Outer Ring: A scale - 10-100 logarithmic; Moveable Ring: B scale - 10-100 logarithmic (top knob); Moveable Inner Disc: C scale - 10-100 logarithmic jwith cursor attached (second side knob); Moveable large cursor (first side knob). Extra fixed scale on outer ring between 70 & 85 running from 20 at 70 to 0 at 85.

Click on the Condition Code to obtain more details.