strange .. I sold that watch a couple of months ago, and it left me after having been in for a service, i'm reasonably sure it didn't need anything other than regulation. Saying that, the biggest fault when the watch came to me was a broken mainspring which had stripped a few teeth off the mainspring barrel as part of its self-destruct sequence, it could be the watchmaker replaced the mainspring and barrel, saw the watch was working OK and didn't go further.. the end result on Watchguy's blog is impressive
When I saw '4520' I was almost expecting it .. they are not exactly common! If it wasn't for the spotty dial that watch would be perfect, I think the 4520 is the king of GS movements (and the one that was used for the observatory trials) .. I much prefer it to the 4522 with date.
The 4522 I have myself also has a bit of dial damage but it is from being, at some point in its life, overoiled and them subsequently stored on its side - there is a stain on the edge of the dial where the lacquer has started to lift off. It's not extremely noticeable.
I have a pet hatred for redialled watches and would prefer an original dial with a bit of damage to a 'looks like new' redial any day - the thing is the level of workmanship on these old Grand Seiko watches is not achievable by any redialler.
Watch guy's work looks ok enough, and of course it's the watch owner's prerogative to order any work done.. my comment was simply that I was surprised to see a watch that was previously mine being serviced the 2nd time in as many months