Keuffel & Esser Polyphase Duplex Slide Rule No. 4070 Trig
$80
This Keuffel & Esser slide rule set includes the Polyphase Duplex Trig Slide Rule No. 4070 and its manual. It also comes with a black protective case and a "Slide Rules" booklet. These are calculating instruments from Keuffel & Esser Co. Vintage. Collectors item.
Good condition. Pickup in Ottewell
- ConditionGood
- BrandKeuffel & Esser
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Noreen Konig
Ottewell
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