Second quarter of 20th century silver cased sprung and sliding bag watch, Vertex, retailed by Fortnum & Mason - London, Shockabsorber, the Swiss 15-jewel movement with mono-metallic balance and lever escapement to a signed and silvered square dial with applied breguet numerals and outside minute track with blued steel moon hands in a rectangular case with ring suspension and sliding cover to a hinged and sprung case with winding crown at 12, with import marks for London 1936, maker's mark VW Ltd (case lacking original leather outer cover), width 31mm
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