Vintage Keuffel & Esser Slide Rule 4070 - 3 With Leather Case Made In USA
Item History & Price
| Reference Number: Avaluer:14259543 | Modified Item: No |
| Country/Region of Manufacture: United States |
Vintage Keuffel & Esser Slide Rule 4070-3 With Leather Case Made in USA MINTThis rule is still in the plastic protective cover and appears be unused. Includes manual and case as well. The box has a little tear in it from taking the rule out and getting it all back in.
From the americanhistory.si.edu website:For information on the patents on the rule, see 1993.0482.01 and 2007.0181.01. Paul E. Gaire of Manasquan, N.J., received a patent for the magnifier in 1951, replacing his earlie...r attempt at a magnifier, which could only be used on one side of a slide rule at a time. This double magnifier was first advertised in Keuffel & Esser's 1954 catalog and first pictured in the 1962 catalog; it sold for $5.50. K&E sold this version of the model 4070-3 slide rule from 1952 to 1962, at a price of $20.50.DATE MADE1954-1962
From the americanhistory.si.edu website:For information on the patents on the rule, see 1993.0482.01 and 2007.0181.01. Paul E. Gaire of Manasquan, N.J., received a patent for the magnifier in 1951, replacing his earlie...r attempt at a magnifier, which could only be used on one side of a slide rule at a time. This double magnifier was first advertised in Keuffel & Esser's 1954 catalog and first pictured in the 1962 catalog; it sold for $5.50. K&E sold this version of the model 4070-3 slide rule from 1952 to 1962, at a price of $20.50.DATE MADE1954-1962
