Thachers Calculator by Keuffel & Esser
- Sold for:
Thacher's Calculator by Keuffel & Esser, New York, Model 4012, No. 1454, with sliding inner cylinder, revolving outer cylinder of scales and wood base with instruction label, with instruction book in maker's mahogany box, lg. 22 1/2 in. Provenance: Dartmouth College, Amos Tuck School of Administration and Finance.