Up for auction: a vintage Keuffel & Esser slide rule, patent number 1,934,232, in used but good condition. This item comes with its original leather carrying case.

Condition:

• Used, good condition for its age

• Leather case shows wear consistent with vintage use

• Slide rule appears intact and functional

• Please review all photos carefully to assess condition

Details:

• Brand: Keuffel & Esser Co., New York

• Patent number: 1,934,232

• Includes original leather carrying case

• Model not identified — I am not a slide rule expert; please refer to photos for details

Collector Notes:

• A nice piece for vintage slide rule collectors, engineers, or history-of-science enthusiasts

• Rare opportunity to acquire a Keuffel & Esser slide rule with original case

Shipping & Packaging:

• Carefully packaged to protect the slide rule and leather case

• Ships via tracked mail

Notes:

• I do not know the exact model, so please look closely at the photos before bidding

• Sold as-is