Details
A Thatcher's calculator,
by Keuffel & Esser, New York, Divided by W.F.Stanley, London, 1882, with sliding inner cylinder, revolving outer cylinder of scales and wood base with instructions -- 22½in. (57cm.) long, in wood box with Keuffel & Esser plaque
by Keuffel & Esser, New York, Divided by W.F.Stanley, London, 1882, with sliding inner cylinder, revolving outer cylinder of scales and wood base with instructions -- 22½in. (57cm.) long, in wood box with Keuffel & Esser plaque