Richard Twort
Philip Harris Barograph
£ 875
Richard Twort
Rare Barograph / Thermograph, Scotland
£ 780
Richard Twort
Magnificent Barograph, Manchester c.1900
£ 2,650
Richard Twort
Negretti & Zambra Open Scale Barograph
£ 675
£ 1,700
£ 7,600
Extremely Rare Redier Barograph by Lund & Blockley, Pall Mall, England
£ 7,600
Richard Twort
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