English verge with matching repoussé chatelaine Circa 1760

Gold-plated pair cased verge pocket watch by Edward Mason
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A very fine English pair-cased spindle watch with matching chatelaine, circa 1760.
A tortoiseshell outer case and gold-plated inner case with master’s mark TP.  White enamel dial with radial Roman hours, an outer minute track with Arabic five-minute numerals and probably original steel poker & beetle hands. The movement is signed and numbered, an English spindle mechanism with pre-tensioning through the worm screw. Comes with a fire-gilded chatelaine and a special matching key with a carabiner head, the chatelaine is presumably French.
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Diameter: 52 mm
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Weight: 107 g
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Signed: Edw. Mason London