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Professor Willis's Odontagraph by HOLTZAPFFEL - Odontograph *SOLD*

Professor Willis's Odontagraph by HOLTZAPFFEL - Odontograph SOLD

Code: 2768

A scarce Professor Willis's brass odontagraph by HOLTZAPFFEL of London.

Also sometimes spelled 'odontograph', an instrument for setting out the teeth on gear wheels.

Marked 'PROFESSOR WILLIS'S ODONTAGRAPH MADE BY HOLTZAPFFEL & Co LONDON' on the shorter arm with 'SCALE OF CENTRES INSIDE THE PITCH CIRCLE OUTSIDE CENTRES' with the graduated scale on the other.

9 inch and 13¹/₂ inch long arms with both being 1³/₈" wide.

A few minor surface scratches, please see images.

A fine example of a rare item.

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