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Keuffel & Esser 4090 Universal 10" Slide Rule; ca. 1910
Lot 677

Keuffel & Esser 4090 Universal 10" Slide Rule; ca. 1910

Estimate: $400 - $500
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Starting Bid
$200
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$0 $10
$100 $25
$500 $50
$1,000 $100
$3,000 $200
$5,000 $500
$10,000 $1,000
$20,000 $2,000
$50,000 $5,000
$100,000 $10,000

K&E 4090 Universal 10" Slide Rule. A scarce, early "dual slide" design with three rails and two conjoined slides. The additional rails made more calculations possible, but was prohibitively expensive to purchase and was discontinued soon after. Mahogany wood covered in celluloid, with a glass indicator. Marked <4090> on one slide, along with "Keuffel & Esser Co. N.Y." and "Pat. Mar.21, '99 Pat. June 5, '00 Dec. 22, '08".  Front side scales:  A [B, C] D, CF [CF, S] A. Back side:  A [BI, CI] D, CF [CI, L, T] D.  Ca. early 1908-1912. Overall 12 5/8 in. L x 2 1/8 in. W.

Condition

Very Good condition with previous owner's initials in four places, slight yellowing with age; slides move stiffly.

Provenance

Private West Tennessee collection.

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