Delrio Chronographe Suisse: a gentleman's gold wrist watch chronograph model, late 1940s, case marked 18K 750, unsigned 17 jewel manual wind movement, metal movement cover, signed round silvered dial with applied copper-coloured alternate Arabic numerals and wedge hour markers, lume plots, sunken 30 minute register and small seconds at 3 and 9 respectively, outer kilometre scale in red and outer tachymeter scale in black, sword hands with lume inserts, dropped lugs, snap-on caseback, crown at 3 and flanked by twin rectangular chronograph push-buttons, on a pierced black leather strap with clasp marked 750, no box and papers (Case: 37.5mm excluding crown)