Comptometer Calculator Model A With Glass Front, S/N 18206




Item History & Price

Information:
Reference Number: Avaluer:32464Maker: Felt & Tarrant
Original Description:
The Comptometer Model A was the successor to the wood-cased Comptometers.  The distinguishing feature is the glass panel over the result wheels in the front, showing the mechanism clearly and making this a strong contender for most steampunk mechanical calculator ever.  The Model A introduced a vastly improved clearing mechanism that stayed with successive models up through the Model F.  Sadly the glass front did not carry on, it was only on the Model A.  
T...his Model A has no mechanical issues at all, only cosmetic ones.  The clearing lever is bent, but doesn’t hit the case and works perfectly.  If you look at the metal dust cover, specifically the dent that bulges outward on the right side, you can see how the clearing lever got bent.  Someone shipped the calculator inside its dust cover with inadequate padding between the two.  Also, you can see spots of rust, and one large patch on the right hand side, making it through the copper plating on the case in many places.  The original glass plate on the front broke, and this one is a replacement.  As for function, everything works fine.  All the keys work, carry works everywhere, and the long-throw clearing lever works: rotate it 120 degrees towards the rear, then pull it back to the front.  Both movements perform part of the clearing.
This planimeter is from the collection of Robert K. (“Bob”) Otnes, PhD, one of the founding members of the Oughtred Society and the original editor of the Journal of the Oughtred Society.  It is being sold by the Oughtred Society on his behalf.
The Oughtred Society was founded in 1991 by a group of slide rule collectors and is dedicated to the preservation and history of slide rules and other calculating instruments. Membership is open to anyone.  Further information about the Oughtred Society can be found at: http://www.oughtred.org/.
PayPal is the only accepted form of payment.  Buyers within California will be charged 7.25% sales tax.
Shipping will be by USPS Priority Mail.  Shipping charges will be somewhat higher for destinations outside the USA.  




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