Vertex 'Dirty Dozen' a chrome plated and stainless steel British military issue wrist watch 1940S. Dial: black, broad arrow, luminous Arabic numerals, white outer minute track with luminous dot 5 minute markers, subsidiary seconds at 6, syringe hands with luminous inserts. Calibre: cal. 20 manual winding, 15 jewels. Case: brushed round, fixed bars, screw down case back engraved with broad arrow W.W.W. A 3410 3516326. Closure: fabric military style pull through strap, steel buckle. Dimensions: 36 mm diameter. Signed: dial and movement. Accessories: none