User:GoldenPhoenix: Difference between revisions

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Revision as of 16:03, 18 July 2023

Specialized in antique calculators.

Slide Rules
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.