Very rare recording plate used by movements makers, 19th century.
Thin brass plate scribed, both sides, and drilled for a typical Lancashire three-quarter plate lever movement, the plate stamped 10. 39 mm diameter.
Plates like these were used to record various different sizes and designs of rough watch movements that could be ordered from the manufacturers prior to being finished. Rough movements rarely survive, these caliper plates even less so.
NB: This plate is from a small collection of plates some of which are stamped I.P, presumably the mark of Joseph Preston, Prescot. With some diligent searching, it should be possible to match this plate with one of the movements it helped produce.
A rare and important aspect of our horological past. In typically handled condition, but still clearly showing the markings, and also with the wear from having being in use.
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