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Pocket watch type slide rule/calculator, the dial marked
Probably made in Paris France by Henri or brother Fred Chatelain,
Calculating Circle after Bucher’s system, circa 1878
Front scales L, Cube Root (3 turns)
Back scales S, C, Square Root (2 turns)
In very good sound condition and working order with smooth operating controls, clean clear printed enamel dials, good blued steel hands and marker.
Good nickel plated brass case with little wear.
The dial screws with some rust but all still good and sound.
Original convex bevelled glasses with very small scratches to the centre of one and small edge chips to the other.
Case 52.5mm diameter x 20mm, weight 115 grams.
Ask the Dealer
As a fine art sculpture graduate I have applied my appreciation and understanding of form and function to my lifelong professional career in the antiques trade. Over forty years dealing in what I considered worthy, within the fields of decorative arts and sciences, I have always purchased over a wide spectrum and look forward to offering an exciting variety of stimulating pieces.