English silver pair cased verge pocket watch with Circa 1802

Silver pocket watch 
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A fine silver pair cased verge watch made by Arnold London England, circa 1802.  Gilt full plate movement with verge escapement, pierced and engraved balance cock, silver regulation disc and fusee and chain with worm and wheel barrel setup between the plates. The plain inner and outer case is crafted from silver and has London Hallmarks from 1802.
White enamel with black Roman numerals and minute outer track, steel poker and beetle hands. The movement is signed and numbered. the watch is in very good condition.
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Diameter: 52 mm
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Weight: 120 g
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Signed: Arnold London
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Pair cased
Pair cased pocket watches were common throughout the 1700s. An inner case holds the watch movement, with an additional outer case that encloses and protects the inner case. The outer case would provide protection from dirt and dust, since the inner cases of key wound watches lacked such coverage.
To identify a pair cased pocket watch, look for these characteristics: an inner case that holds the watch movement and an outer case that encloses and protects the inner case. The outer case may be made of a different material than the inner case, and it may have decorative elements such as engraving or embossing.
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Reference 04500