เจ้าคันโยกน้ำบาดาลนี่เอาไว้ทำไมครับ
เป็นปุ่มกระเดื่องจับเวลา ที่เกรแฮมย้ายเอามาไว้ด้านซ้ายพร้อมกับเม็ดทะยม สร้างมาเพื่อให้เป็นเอกลักษณ์เฉพาะตัว
ตามนี้ครับ
Start and stop the chronograph with the lever 1 using your thumb 2 .
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Left-hand push-pieces such as this were first used by bomber pilots during the Second World War. This is because during high-altitude flights, at more than 26,000 ft, the extremely low temperature forced
them to wear big mittens. They therefore needed an instrument which had an especially large push piece that enabled them to operate it with their thumb.
The activation of the start and stop functions with the thumb, which reacts faster than the other fingers, guarantees the most direct response. In the days when sports times were measured manually, it was the thumb that was used to operate the stopwatch.
