Model: Premier Chronograph Reference: 770Date: c.1953Movement: Manual-winding, Venus cal.150Dial: Silvered, outer tachymeter scale, inner minute scale, applied gold Arabic numeral hour markers, subsidiary seconds dials for running seconds and chronograph minutes, gilt-metal hands, centre chronograph seconds handCase: 18ct gold, fixed stepped bezel, gold-capped chronograph pushers, oversized crown, snap-on caseback, numbered '655487'Strap: Later replacement, generic brown leather, gilt-metal tang buckleSize: 35.5mmAccompaniments: None