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Anonymous Tue Nov 6 10:45:02 2018 No.13819729 [View]
File: 40 KB, 400x628, eta_2846.jpg [View same] [iqdb] [saucenao] [google]

Working on a 2002 Tissot with an ETA-2846, a sort of obscure modern ETA movement. Since it's 21600bph I thought at first that its either from some left-over production line of some old caliber, or some downgrade.

Turns out by lowering the beat rate, which would require a weaker, i.e. thinner mainspring, they could put a longer one in a standard 28800bph barrel, meaning this movement has a running time of 48 hours.

Also for some reason the day-date mechanism is completely different from any other ETA I saw before.

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