

Here you can see the gunk I was talking about. It will not damage the movement, but if it gets to the dial or date wheel it will cause damage.

The lid of the barrel is jewelled.

Movement has been cleaned and ready to be put back together.

Movement starts running straight away after fitting the balance.

Dial and hands go back onto the movement.
2 Responses to Service: Grand Seiko 9990 calibre 5722A
Very nice! Startlingly similar to 5740C Don’t you think M 😉
One thing they definitely have in common is the overall good build quality.