Vintage, 53.0 mm, 1970's Heuer Inter-Club stopwatch with Hour Timer 7714. The legibility of this specialised 1/10 second stopwatch is guaranteed by a patented system of HEUER. A central red sweep hand reads 1/10 seconds on the periphery of the dial. The distance between dial marks measures 2.5 mm or five times as much as on traditional stopwatch dials. A central yellow hand indicates full seconds from 0 - 60. The sturdy precision lever movement is shock protected and equipped with 7 jewels and a micrometer adjusting device for the utmost in precision. High visibility. NOS Aluminium plate case. Case back sticker wearing in legibility. In excellent, vintage working order.