Three calculators early 20th century, (3)
71
Scientific Instruments
Three calculators early 20th century,
comprising a Fowler's Long Scale circular slide rule in watch-form case and chromed metal carrying case; a Fowler's Extra Long Scale circular slide rule in leather carrying case and an Otis King's Patent cylindrical slide rule in leather carrying case (3)
Sold for £175 inc. premium

Category: Collectibles / Mechanical Music

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