User:GoldenPhoenix: Difference between revisions
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Revision as of 16:03, 18 July 2023
Specialized in antique calculators.
| Model | Manufacturer | Layout | Length | Scales | Case | Acquisition Date | Notes |
|---|---|---|---|---|---|---|---|
| 67/87 Rb Rietz | A.W. Faber-Castell | Rietz | Pocket (5") | L K A (B CI C) D S ST T | Green zippered leather, includes stylus. | Feb. 5, 2023 | Includes addiator on the back of the rule. One of a few slide rules capable of all four elementary functions. |
| V.I. 70-80 | A.W. Faber-Castell | Simplex (specialized) | Pocket+ (7") | cm SRU SSU (°C °F C) D Centistokes Engler in. [front]
(Dichte API) Ref: °C/°F m³/bbl kg/lb ms⁻¹/ft.s⁻¹ [back] |
Black leather, branded "Esso." | Jul. 7, 2022 | A highly unusual rule created for the Esso company, exact purpose currently unknown. |
| № 400 | ACU-MATH | Mannheim | Standard (10") | Sa K A (B CI C) D L T | thin canvas, coated in plastic. Very poor condition. | Ca. May 14, 2023 | A rare layout with all scales on the front. Like all Mannheim rules, the S scale is keyed to the A scale, rather than the C scale. |