- CLARKS COMPUTER SURVEYORS SLIDE RULE/CALCULATOR
- IN IVORINE (PLASTIC)
- CLARKS ST PETERS CHURCH YARD CHESTER
- PATENT No. 249784
- 9 CM DIAMETER
- IN EXCELLENT CONDITION
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Catom Scientific Antiques has been buying and selling antique scientific instruments for many years, specialising in slide rules and calculating instruments, microscopes and microscope slides.
A member of the Oughtred Society, the international organisation dedicated to the history and collection of slide rules, and the UK Slide Rule Circle. Has also acted as a consultant for Miller's and Lyle's Antique Guides, and a number of UK auction houses.
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