French gold repeater with pin wheel escapement Circa 1815

Unique open faced repeating gentleman’s pocket watch
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A unique, very fine French quarter repeating gentleman’s pocket watch with pin wheel escapement, circa 1815.
18 Carat rose gold polished case with reeded band, pusher for repetition via pendant, and case maker punch mark Greek letter Phi and PG. Enamel dial with Arabic numerals and blued Breguet hands. 1/2 plate movement, key wind, florally hand engraved and gilt, with two hammers, two gongs, going barrel, pin wheel escapement, and three arm steel balance.
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Diameter: 57 mm
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Weight: 105 g
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Signed: No name
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There is only one other pocket watch known that is fitted with this combination of the pin wheel escapement and repeater mechanism. That one is signed “Carl Zademach à Leipzig” and contains almost identical engraved decorative elements on the clockwork. Furthermore, the work of the construction is very similar.