No 5343, New York: Keuffel & Esser, c.1920, multi-faceted cylindrical slide rule with wood end caps, affixed to wooden base by brass guides, instructions to base, mahogany lided case with matching serial number, Keuffel & Esser label inside case lid, — THACHER CYLINDRICAL SLIDE RULE MODEL 4012

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Estimate: $800–$1,200 hammer
Result
Performance
Sale: Bonhams — History of Science and Technology, including Air and Space, Los Angeles · 5 November 2020
Record ID: TB-2026-693372
Record: first seen 21 Jul 2026 · updated 21 Jul 2026 · source ↗
Cite this record: TB-2026-693372 — https://thebasis.art/cite/TB-2026-693372

Thacher Cylindrical Slide Rule Model 4012., No 5343, New York: Keuffel & Esser, c.1920, multi-faceted cylindrical slide rule with wood end caps, affixed to wooden base by brass guides, instructions to base, mahogany lided case with matching serial number, Keuffel & Esser label inside case lid,. Bonhams, 5 Nov 2020, lot 47. result recorded. TheBasis.Art, TB-2026-693372.

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Thacher Cylindrical Slide Rule Model 4012., No 5343, New York: Keuffel & Esser, c.1920, multi-faceted cylindrical slide rule with wood end caps, affixed to wooden base by brass guides, instructions to base, mahogany lided case with matching serial number, Keuffel & Esser label inside case lid,. Bonhams, 5 Nov 2020, lot 47. result recorded. TheBasis.Art, TB-2026-693372.

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From the same sale History of Science and Technology, including Air and Space · Nov 2020

Lot	Artist	Estimate
DARWIN, CHARLES. 1809-1882. Autograph Manuscript Leaf Signed ("Ch. Da…	A Highly Important Darwin Manuscript.	$250,000–$350,000
Anatomia Universale. Florence: 1833.	Mascagni, Paolo. 1752-1815.	$6,000–$8,000
35mm motion picture camera, London, Prestwich Manufacturing Co., c.18…	Prestwich Model 5	$15,000–$20,000
PAULING, LINUS. 1901-1994. Autograph Manuscript Signed ("Linus Paulin…	Pauling, Linus. 1901-1994. Autograph Manuscript Signed	$6,000–$8,000
Rabdologiae seu numerationis per virgulas libri duo. Leiden: Peter Ra…	Napier, John. 1550-1617.	$2,000–$3,000
Group of silicon integrated circuit slices, Dallas, 1965-1967,	Texas Instruments "large-scale Integration" Integrated Circuits	$5,000–$7,000

Comparable results nearest sold works, same medium & price band

Artist	Lot	Result USD, incl. premium	Sale
Thacher Cylindrical Slide Rule Model 4012.	No 3117, New York: Keuffel & Esser, c.1910,	$1,536	Bonhams, Oct 2023
Apollo 11: Nasa "red Number" Photograph	BUZZ ALDRIN DESCENDS THE LM LADDER. Color photograh, 8 x 10		Bonhams, Jul 2021
Jacquard, Joseph-marie. 1752-1834.	THE MOST FAMOUS IMAGE IN THE EARLY HISTORY OF COMPUTING. Wov		Bonhams, Nov 2021
Apollo 11: Nasa "red Number" Photograph	PARTIAL EARTH VIEW. Vintage NASA chromogenic color photogra		Bonhams, Nov 2021
Altair 8800	8-bit microcomputer by MITS, c.1974, metal case with removab		Bonhams, Nov 2020
Apollo 8 Earthrise	SIGNED WITH CHRISTMAS MESSAGE FROM FRANK BORMAN. Large forma		Bonhams, Nov 2021
Apollo 11: Nasa "red Number" Photograph	ALAN SHEPARD POSES WITH THE U.S. FLAG. Vintage NASA chromoge		Bonhams, Nov 2021
Altair 8800	8-bit microcomputer by MITS, c.1974, metal case with removab		Bonhams, Nov 2021

The closest sold results by price, artist, and medium — the appraiser's comp set, generated from the corpus. All figures converted to USD at current reference rates.