Check the listing for details. Keuffel & Esser Polyphase 4053-3 Slide Rule 1900 w/ Case K&E Vintage. Condition: Used. Listed at 19.99 USD. Keuffel & Esser Polyphase 4053-3 Slide Rule 1900 w/ Case K&E Vintage. Condition is Used. Shipped with USPS Ground Advantage.
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