47 - BWC SWISS Vintage Chronograph Ref. 923000, circa the 1970s. Stainless steel case with a screw-down caseback. Lemania Cal. 1340 automatic movement with excellent accuracy (+1 s/d, 277° amplitude). Blue dial with a silver horizontal stripe, baton indices with tritium luminescent dots, two sub-dials, date window, and tachymeter scale on the flange. Stainless steel baton hands with tritium inserts, central stop-second and stop-minute hands, chronograph minute and hour counters in high-contrast orange. Neutral stainless steel link bracelet with folding clasp. In good condition with honest signs of wear; the tritium glows evenly under UV light and loses its luminosity shortly after the light source is removed. Diameter approx. 40 mm, measured without the crown. Fits a wrist circumference of up to approx. 18 cm.