Lot 259 , A 20th century barograph by Tycos, in a mahogany case with bevelled glass panels and incorporating an ink bottle and a drawer with spare graph papers, 36.5cm x 21.5cm

A 20th century barograph by Tycos, in a mahogany case with bevelled glass panels and incorporating an ink bottle and a drawer with spare graph papers, 36.5cm x 21.5cm
£300-500

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