Wyler Vetta watch, Incaflex Anti-magnetic - Shock proof from the 1960s, hand-wound. Gold laminated steel case, diameter 34 mm, thickness 5 mm. Gold-coloured markers and hand. Hand-wound mechanism with Incaflex spring. In 1927, Paul Wyler designed a tough and robust balance spring, characterised by a spiral with flexible arms able to cushion the most violent impacts and even absorb lateral blows. Incaflex marks an important stage in the history of watch-making by transforming a fragile and delicate watch which was to be worn only on important occasions into an accessory for every-day use, tough, sturdy and reliable. Watch in perfect working order.