| Brand | Keuffel & Esser |
|---|---|
| Type | Slide Rule |
| Country of Origin | United States |
Check the listing for details. KEUFFEL & ESSER Vintage SLIDE RULE Polyphase Duplex 4098A w/OG Leather Case USA. Condition: Used, Made in United States. Listed at 28.00 USD. KEUFFEL & ESSER.
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Guide to the Stars - Northern Hemisphere © 2010 Ken Graun - 11-inch diameter