Lings 21 Prix Chronostop Swiss wristwatch, OC cal. 120 in perfect working order, like new (see photos). A "chronostop" is a chronograph of a particular type because there is no automatic reset to 0 (unless you set all the hands at 12 o'clock yourself). Model used particularly by doctors to monitor the duration of operations. Measurements: - case: 37 mm excluding the crown - thickness: 12 mm - strap width: 20 mm Details: - Lapanouse movement, hand wind, gold-plated case (reference hallmark on the back) - the 2 push buttons are perfectly functional: the upper one is used to stop the second hand and the movement, the lower one allows you to restart - the small counter on the left is read anticlockwise and counts down the hours; the hand is slightly offset: 6 graduations = 1 hour - flawless Plexiglas crystal - Rallye leather strap, new, with holes and a golden metal strap provided too (see one of the photos) - embossed golden markers for the hours - scales: red telemetric and blue tachymeter Beautiful original piece for collectors and enthusiasts. Careful, insured shipping + tracking number.