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I just acquired this week a Seiko SVCS003 6R15A (with two bracelets) that had been sitting in the seller's drawer unused for some years. While the watch is beautiful, it is horribly inaccurate. As I am a newcomer to watch repair, I would like to know if it is possible to regulate this watch to acceptable performance, which I would try to do myself, or if the huge disparity is indicative of some other, much more expensive problem. Apologies in advance if this is not an appropriate location for posting. Appreciation for any and all comments.

Hi all, First of all I would like to say I am new to the forum. I have been working on watches for quite some time now but this one has me stumped (mostly because it's my newest, least touched watch!). A little bit of backstory. This watch is about 2 years old, I purchased it new (Seiko SARB033). It ran fantastically, i got it down to +2 seconds a day and it was a very consistent watch. About a month ago it started losing time. Badly, around 1-2 minutes a day. I initially thought the regulator might have slipped out of position so i adjusted it up. But it still ran poorly, gaining massive amounts and then losing massive amounts. So, I put it on the timegrapher i recently purchased and found this. Does not look good. Can't get amplitude above 180 and there is a strange drop off on the lower line that comes around regularly. I demagnetized the watch and the balance separately, but to no avail. Beat error was also horrible (around 2.5ms), but i've adjusted that down a bit just so it could be read easier. What do you think guys? Escapement fault? Gear train? Slipping mainspring?