Heuer Autavia GMT Ref 2446 a stainless steel chronograph bracelet watch circa 1968; dial: black, luminous baton hour markers, silvered subsidiary dials, luminous arrow tipped red GMT hand; calibre: cal. 724 manual winding, 17 jewels; case: brushed round, snap on back, bi-directional blue and red 24-hour marker bezel; closure: Gay Freres link bracelet with Hlb end links and folding clasp; dimensions: 40 mm diameter, bracelet circumference approximately 172 mm; signed: case, dial and movement; accessories: Heuer Autavia GMT ref 2446 instructions leaflet, original cardboard box;