14th May, 2011 9:30 GMT/BST
Antiques & Scientific
1009
A Fuller's Spiral Slide Rule Calculator by W.F. Stanley, Great Turnstile, Holborn, with walnut...
A Fuller's Spiral Slide Rule Calculator by W.F. Stanley, Great Turnstile, Holborn, with walnut handle, brass fittings, in a mahogany 'Calculator' box with makers label to underside of lid
Sold for £650
Estimated at £200 - £300
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