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| Item# | Type | Model No. | Model Name | Maker | Country | Material | Diameter | Date | Condition |
| HAL004 | Pocket | 2122 | Halden's Calculex | Joseph Halden | UK | Silver | "2-7/16" | c. 1910 - 1914 | C5 |
Notes: Hopp Type 1a. Silver variety of calculator and comes in a plastic pill box case. Glass cursors with thin beveled edge.
Click on the Condition Code to obtain more details.
