Archive
of
Collections
Details and Image
Item# | Type | Model No. | Model Name | Maker | Country | Material | Diameter | Date | Condition |
CHT001 | Pocket | Type 3 Thin | Calculigraphe | Henri Chatelain | France | Nickel-plated brass | "2-1/8" | c. 1878-1894 | C5 |
Notes: "Thin"" version - 5/8"" (16mm) thick. Has oval chain loop and short knob. Same scales as Boucher's Calculator. Knob rotates front scale and turns cursors front and back when side button is pressed. H.C. with opisometer logo. No Made in France."
Click on the Condition Code to obtain more details.