Anyone got the Seiko SPB151J1...Willard??

[Gary Busey]

Originally Posted by Lol-x

I saw an online article about the 6R35 calibre movement.
It said to fully wind the power reserve one had to wind the crown a minimum of 55 times.

So I wound it 60 times yesterday and on the timegrapher it showed this today:

Attachment 1290671

But now an hour later the timegrapher is showing +8 seconds and 247 degrees and 0.2ms beat error.

So it seems this movement is all over the place, which makes it really hard to regulate. No wonder Seiko gave it a +25 to -15 seconds per day specification.

To seikos defence, they really “undersell/overdeliver” on accuracy numbers.
To me, from a movement standpoint Seiko gets interesting at the 8L level. You can get an amazing piece in the secondary market….for a great price. But the 6r35 is just a bit too flimsy…


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