Flints Auctions Ltd, Rivermead, Thatcham, UK
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LOT 1134:
A Rare Met Office Pilot Balloon Slide Rule, English, c.1940, marked 'JAMES FARROW LONDON' and marked at the top ...
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Start price:
£
65
Estimate :
£80 - £120
Buyer's Premium: 25%
More details
VAT: 20%
On commission only
Users from foreign countries may be exempted from tax payments, according to the relevant tax regulations
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A Rare Met Office Pilot Balloon Slide Rule, English, c.1940, marked 'JAMES FARROW LONDON' and marked at the top 'PILOT BALLOON SLIDE RULE MARK 1' and marked with a met office logo and number 820/41, constructed of polished mahogany with applied white celluloid scales with 3 brass slides in a later fitted case The Pilot Baalloon Slide Rule: originally used by the Meteorological Office to calculate the wind velocity from theodolite readings made with pilot-balloon observations.
