English 18 carat gold pair cased verge pocket watch Circa 1702

Gold open faced pocket watch
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A very fine of good quality pair cased verge pocket watch, circa 1702.
The outer- and innercase are both 18 carat gold, case maker’s punch mark “WB” (William Bertram). Gold/ Champlevé dial, full plate movement, chain/fusee, three arm steel balance.
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Diameter: 57 mm
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Weight: 147 g
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Signed:  Brouncker Watts   London
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Brouncker Watts (1684-1720) was a maker of high quality watches and clocks in London.