A7750 in IWC 3717

[dbutlerman]

I have a new rep IWC 3717 with the 28.8K movement that is running about 15 seconds fast per day. I know that is within spec, but I would like to slow it down a bit. I've read the threads on adjusting movements, and have regulated my Swiss ETA 2836-2 movement to within about 2 seconds per day.

I have borrowed some pictures since I didn't take pictures while I had to watch open...

I was expecting to see something like this:

A movement with no regulator. I was expecting to have to adjust the actual arm to slow the movement. But instead I found a movement like this, which has a regulator (less the H logo, of course).

My question is...will adjusting the regulator, as opposed to the arm adjust the hairspring, or is the regulator a "non-functioning" one? Sorry for the lack of my own pictures, but I didn't think to take pictures while I had it open, and I understand if you can't answer my question without seeing my movement...

Thanks,

D

[dbutlerman]

OK, so I knew it would be hard to answer my question without pictures of my movement, so...I opened it back up and here are the pictures...

Hope these help...

D

[FxrAndy]

for some reason i cant see your pictures but there is a very good guide here

[dbutlerman]

for some reason i cant see your pictures but there is a very good guide here

I've been to that guide, but my 7750 doesn't look like the 7750 in the guide. Mine has a Fine Scale Regulation arm...I could PM you the pictures if that'd help...

D

[ubiquitous]

I would advise to leave it alone. If you are not familiar with this procedure, you stand to risk more harm than good.

+15sec/day is not terribly bad. If the watch is new, you may even notice that it will settle out a bit according to your wearing habits and how you position it over night.

[RWG Technical]

15 seconds a day is better than the factory specs for many ETA's...

The fine regulator may? work, but my experience is that as soon as you move it, it breaks and falls to pieces.

I DON"T recommend that you attempt to adjust the regulator arm, your odds of damaging the hairspring is too high. As well, any of these adjustments without knowing and making sure the beat is correct (which requires a timing machine) are really in vain, beat is more important to the long life of the movement.

[dbutlerman]

Thanks Zig! I'll listen to your and Ubi's advice and leave it alone. For identification purposes does the movement appear to be a Asian 7750-2? And if so what is your opinion on them? Should I have I serviced soon like the other 7750s? Thanks for the help...

[RWG Technical]

There is no standard condition of a A7750. All need to be serviced, some are soaked in grease and oil, others are completely dry. All are clean. If your not experiencing any problems I would enjoy the watch, if after a year or so you still like it and expect to keep it for a long time, consider having it serviced.