Large silver German half quarter repeating verge Circa 1740

Silver German half quarter repeating verge pocket watch
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A large German half quarter repeating verge in a silver consular case circa 1740. Full plate gilt fusee movement with square baluster pillars. Plain sprung dust ring. Unusual bridge cock with silver mask pierced and engraved in the form of a double headed eagle, garnet end stone. Plain three arm gilt balance with blue steel spiral hairspring. Pierced and engraved silver plate with regulator dial, blue steel indicator. 

Push pendant half quarter repeating on a bell in the back of the case. Small slide at the edge of the dial to make the repeat sound a toc. Signed white enamel dial, Roman numerals, decorative gilt hands. Large silver consular case, the edge of the back engraved and pierced to allow the bell to sound clear. Central rotating circular silver shutter to the winding aperture, silver push pendant and bow.
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Diameter: 61 mm
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Signed: G Ch Hiltel Regensburg
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Early and unusual use of all or nothing mechanism on this design of repeating work.