Amsler Type 6 Planimeter, marked Stanley, Great Turnstile London

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The Amsler Type 6 planimeter is the same as the Type 4 with the addition of two upward-facing points on the top. The points are for use measuring the mean height of steam engine indicator diagrams. This Type 6 is marked "Stanley. Great Turnstile. Holborn. London. Agent", which means it was made after 1875 when Stanley acquired the distribution rights for Amsler planimeters in the UK. There is no "J. Amsler" mark on it, so it is before 1914.This Type 6 is in fair condition, with some corrosion on the tracing wheel and worm gear.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 behalf of the estate of Robert K. Otnes.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: /.PayPal is the only accepted form of payment. Buyers within California will be charged 7.25% sales tax. Buyers in other states will be charged their local sales tax.Shipping will be by USPS Priority Mail. Shipping charges will be somewhat higher for destinations outside the read more

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