- July 9, 2026This wonderful slide rule is a reminder of days gone by. Dating from the first decade of the last century,…
- July 9, 2026The Vintage Keuffel & Esser Drafting Tool Polar Planimeter Vernier is a rare and valuable artifact manufactured by Keuffel &…
- July 9, 20261920s Keuffel & Esser Co. Drafting Slide Ruler 4081-3 w/ Leather Case & Box Description: For your consideration is this…
- July 9, 2026FREE Trial! 5” x 5” x 1” / Tape Length – 75'4" (Width x Depth x Height).
- July 9, 2026Marked 1900 & 1915 patents. Age - ca 1920's. Condition - Very good overall. Strap missing from case.
- July 9, 2026You are purchasing an Antique Keuffel & Esser Co Slide Ruler with Original Leather Case for.
- July 9, 2026This is a wonderful antique Keuffel & Esser Three Compass Set in a Leather Pin Latch Case. It is in…
- July 9, 2026This antique Keuffel & Esser 4088-3 slide rule, patented on June 5, 1900 and December 22, 1908, comes in its…
- July 9, 2026Vintage Antique K & E Keuffel & Esser CO. N.Y. 4041 Mannheim Slide Rule w/ Case
- July 9, 2026Original Patent June 5, 1900 Keuffel & Esser Slide Rule w/Leather Holder WOW! Here is an Original Patent June 5,…
- July 9, 2026Antique Keuffel & Esser Beginners Slide Rule 4058 Patent 1916 Students With Case Case is probably not original. Does not…
- July 9, 2026Marked 1900 & 1915 patents. Age - ca 1920's.
