subir fotos onlineTissot Seastar 1000 Powermatic vs. older model Seastar
If you put a 2013 and 2014 Seastar 1000 watch next to each other it will take a minute to see the differences between the two. There are many, though. Let's start with the bezel. For 2014, Tissot is giving the Seastar a ceramic bezel insert, which will come in blue, black, and a maroon red. The latter, of course, gives the watch a black and red tone similar to the very trendy Tudor Heritage Black Bay. The ceramic bezel inserts are rather nice, actually. Rather than just being a flat ring, they slope just a bit where the bezel meets the dial and the markers are actually cut into the bezel rather than being printed on it.
ABTW
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subefotosThis new bezel design also means that the "serrated" grip on the outside of the bezel is a bit more prominent on the new model as compared to the older models. Over the dial is an AR coated sapphire crystal and there are also some minor changes on the dial. Of course, the overall look and feel of the Seastar dial is the same, but the new model features an upgraded look. This starts with the new applied hour markers that are metal and then filled in with lume, along with a new date window that is a distinct entity versus blending in with the 3 o'clock hour indicator. Side by side, one can see the visual differences much more.
What is also new is the "Powermatic 80" indicator on the dial. This is because the Tissot Seastar 1000 no longer uses the Swiss ETA 2824 automatic movement, but rather the new Tissot Powermatic 80 automatic movement which is the ETA caliber CO7.111. This I believe is essentially a modification of the 2824 but with an 80 hour versus roughly 40 hour power reserve. How do they do that? Basically the frequency of the balance wheel is reduced so that it draws less power and thus allows for a longer power reserve.
It is possible that ETA was able to insert a larger mainspring as well, but the 80 hours of power reserve seems to mostly be a function of reducing the frequency of the 2824 from 4 Hz (28,800 bph) to 3 Hz, (21,600 bph) in the CO7.111. What does this mean? Well when a movement operates at a slower frequency there are less beats per a second, and thus are deviations in accuracy will be more pronounced. That means errors in timing will be more visible and while the watch will have a longer power reserve, if not regulated properly, it might not be as accurate over time.
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