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The legend on the bottom. Try searching for a popular competing website, and look at their opportunities for ideas. The show is called "Design For The Real … Unlike modern electronic calculators, the Curta was entirely mechanical. Visitez eBay pour une grande sélection de curta calculator. Made in Liechtenstein 1948 - 1972. can shows some wear from usage but curta … I found somewhere that there are +/- 80000 Curta I and 60000 Curta II machines. shorf insfruciions sheef "YOUR CURTA CALCULATOR" which accompanies every CURTA machine, and If IS assumed that the use of the machine for effecting the four arithmetical rules, as described therein, is understood. The Curta's design is a descendant of Gottfried Leibniz's Stepped Reckoner and Charles Thomas's Arithmometer, accumulating values on cogs, which are added or complemented by a stepped drum mechanism. Ser. Design For The Real World by Chris Spurgeon - Audio This is an audio track by Chris Spurgeon about the Curta. Curta type 1 mechanical calculator serial #72858 (mocksville) Sold at 975 $ Curta type 1 serial #72858 with original plastic can and original examples book. Traffic to Competitors . Start free trial for all Keywords. The CURTA mechanical calculator literally saved its inventor’s life.

Curta Type II Handheld Mechanical Calculator. It has an extremely compact design: a small cylinder that fits in the palm of the hand.

To those who are familiar with old mechanical calculating equipment, the name brings to mind thoughts of high precision machining, extreme mechanical design, and, to those who've been lucky enough to use one, the wonderful feel of the mechanism in operation.

CURTA calculator Type I. I wonder if the Chinese might take off with the plans and start making clones, the same way you can now find surprisingly good mechanical watches on AliExpress.

No. 535708 Perfect working condition in good case. The Curta. bunderbunder on Dec 31, 2017. Some minor fading of white engraved digits on green case (see pic) Includes reproduction manual.

Every example in this collection relates to both CURTA models, wifh the excepfion of those which are marked only CURTA Model Il".

It could add, subtract, multiply and divide, and unlike other … The CURTA Collectors and Registry Page from the Rick Furr's website vcalc.net "The Calculator Reference": More than 1,000 Curtas with information about its owners and some of the history of the machine. 22 Avg. All functions work perfectly. 52 mm diameter x 105 mm high (2" x 4"). In the first two series, the Curta calculator, the camera Carena, the caliper of the PAV and the Hilti Hammer, Kaiser walking mobile excavators and the heating surface aluFer were presented by the Hoval. Shipping is made from France. The Curta is a small mechanical calculator developed by Curt Herzstark. It is a new REPRODUCTION, perfect for replacing broken one. Great condition.

Sure enough they reference both the site and simulator. Elle est composée d'un corps cylindrique et d'une petite manivelle la faisant ressembler à un moulin à poivre ou à café. purchased new in 1969 and used approximately 24 months in sports car rallies. One of the people that I worked with got all the Curta calculators, probably 10-12 , the company got rid of when the square root extracting desktop Marchants/Friedens came along. I did get to use a Curta for about a year until bigger and better things came along. Adam walks us through his collection of analog calculators, culminating in one of his newest favorite objects: a 3D-printed Curta calculator that's a perfect scaled reproduction of the intricate mechanical computer. They were made from 1948 until +/- 1972 so if they have made the same number of machines every year, and I am sure they did not, you could use the next formulas to calculate the estimated year of production: Curta I : YEAR = 1948 + ( SERIALNR / 80,000 ) * 24 The Curta Calculator simulation is a 3D re-creation of the original portable mechanical calculator, invented by Curt Herzstark.