Agassiz, Watch Comp., St. Imier, "GCT" (Greenwich Civil Time)格林威治時間，機蕊號 226946，錶殼號 226946，53 mm，84 g，約 1941
Agassiz, Watch Comp., St. Imier, "GCT" (Greenwich Civil Time), Movement No. 226946, Case No. 226946, 53 mm, 84 g, circa 1941
A rare deck watch with 24h indicator and 24h power reserve indicator for the US American armed forces
Case: steel, polished, push back, seconds stop device. Dial: silvered, Arabic numerals, centre seconds, blued leaf hands. Movm.: bridge movement, nickel-plated, ground, signed, 3 adj., 21 jewels, Glucydur screw balance, cam type fine adjusting device, Glucydur lever.
"G.C.T." = "Greenwich Civil Time"
The designation "G.C.T." = "Greenwich Civil Time" was originally introduced in America to bring some order into the somewhat confusing concept of time measurement: in nautical science 12 noon marked the end of the day, whereas in astronomical usage it was the start of that same day. In article VI of its resolutions the International Meridien Conference in Washington in 1884 expressed the hope that "as soon as may be practicable the astronomical and nautical days will be arranged everywhere to begin at midnight". So "GCT" was, in fact, the same as "Greenwich Mean Time" but with the day starting at midnight. One of the few protests against this suggestion came from the British Royal Navy, who used the abbreviation "GCT" for "Gunnery Control Tower" and expected this to lead to confusions.
机蕊 非常好, 走動正常
机蕊 非常好, 走動正常