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Keuffel & Esser Slide Rule |
Details: | Manufacturer, batch number and other markings:Keuffel & Esser Co. N.Y. 166130. Colours: ivory Origin: U.S.A. Damage: mint, some ageing on case General Comments: Ivory slide rule in near perfect condition - Patnet No. 2.068.502. Leather covered wood casing showing Polyphase Duplex Decitric trade mark. Height: 3 x 32 x 5cm. |
Delivery Method: | econo. You are welcome to accumulate items from Collectors Online auctions closing over a period of up to 14 days and save on delivery charges. The exact costs will depend on the items won and how many can be safely packed together. |
Keuffel & Esser Slide Rule |
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E&OE |