I own a 'Sapphire Seiko' diver in the roughly $1000 range I LOVE and wear for work, under the radar but gives me pleasure... getting no attention, although occasionally mistaken for a Submariner by NON WATCH people... anyway... I have the same poor timekeeeping, (although within Seiko's wiiiiide specs) and I had the chance to get this watch of yours, from an AD. I LOVED it in pictures and still do... but my experience with NON GS SEIKO movements has been well... disappointing. Mine is many minutes slow each couple of months... and although Seiko clearly states the "tolerance" of something like 20 seconds a day or something... I would never have actually expected it to be, well... TRUE! (mine is like 15 seconds a day off) Seiko apparently finds this acceptable in a roughly 1K watch all the way to 6K! To me, it is not cool. But as much as this disappoints me, the entirety of the rest of the watch exceeds my expectations. I simply love everything else about it. To the fine detail. But I personally could not forgive this timekeeping issue if I spent 6K... so I didn't. With that said, I LOVE YOUR WATCH. And I believe it can be fixed (adjusted) by a competent watchmaker. One day, I will fix mine. But I repeat, I still LOVE IT.