RWG Technical

Have a read of these two posts, they should answer your questions... Must read new watch owner #1 Must read new watch owner #2 RG

I would scrub it well with soad and water to remove any trace of WD40. If you put a bit of 3 in one oil on the crown where it seats into the case it will be fine...a dab of instant glue and it will secure it in place. RG

You could have one of two problems... 1. Crowns come in two sizes, 0.90 and 1.20mm, confirm that the crown you have is a 1.20mm hole. 2. If you cut the stem of the new watch you have to make sure that the threads are filled down and there is no burr on the threaded portion. If you simply removed the old stem from the old crown, this should not be an issue... I have noted some problems with the thread cutting on these ones, if after checking the above, you still can't get it to work, have a look at the hole under a good light and a loupe...you should be able to see the threads clearly, could be it was not tapped following drilling... RG

All the best Arthur. RG

This post shows in detail how to install and remove the stem on that particular model. Keyless works are different on an automatic or manual, this post details how to remove the stem from that movement... PAM 111 how to... From your description, it appears that the set lever has loosened from the stem, re-setting it should fix your problem. Have a read over the post, especially the last part on how to insert the stem, and it should allow you to correct this. I think you will find the set lever screw loose when you open it up... Good luck, RG

Hypo cement has failed me on many times as well with anything but crystal installs... Just this weekend, while doing home reno's with my recently aligned bezel on my SMP Chrono, the bezel flew out from the shock of hammering... this is the second time this has happended... I use only structural epoxy from now on, dont' trust the GS for inserts anymore... RG

Makes no difference any way...and running it does not affect the reserve, if fully wound it has to turn so many times before it unwinds, chrono on or off does not affect this...your equating reserve with power output, they are not the same. Once wound the watch will continue to run until the mainspring is unwound, it takes no more power to do this with the chrono on or off... Use the heck out of it, I have done so to one of mine for 22 months now and it's still working strong... RG

It sounds like one or both of the click wheels is defective... An easy test is to hold the watch flat dial up, wind it slowly with the crown...if the rotor is spinning you have a defective click wheel... RG

I have a genuine 1930 Rolex pocket watch that I am servicing this week, it looks NOTHING like this one... RG

Asian TRUE 7753 layout would be excellent, but I have never heard of any or seen any... RG Asian TRUE 7753 layout would be excellent, but I have never heard of any or seen any... RG

20 seconds for an Asian is fine... If it's new, it should settle down in a month or so and you'll get a good indication of how it's running. Unlike most models, this one does NOT have a fine regulator, making adjusting without a timing machine risky and time consuming...risky cause you have to move the actual regulator arm, and time consuming without a timing machine to see what your adjustment does... RG

You did not say if it's an Asian 7750 or an ETA... In any event, 15-20 seconds per day is very good for most movements, even the ETA 2836 tech specs is around +- 15 seconds per day... There are too many variables when wearing the watch, storing it, etc, that affect timekeeping, unless you have a timer to verify the adjustments, you will drive yourself crazy trying to get it more accurate. RG

Ok sorry for misreading your info, I had never heard of removing a movement and reinstalling it in a case without removing the stem...that is what threw me off... Having said that I am at a loss as to the problem...it's difficult to find problems when you can hold and look at the watch in person, but almost impossible to do it on a forum... I am not sure what the problem could be it could be hands touching, or the hacking lever as it can pop out of place, or any of a number of things... If I saw it in person, I could probably be of more help...sorry... RG

I only have a few minutes so I will get right to it... First point, never ever remove the stem on a 7750 with the watch in any position but the WINDING position...actually do this on every watch... I know it goes against the "Experts" but it has never failed me, and I have removed a number of stems... The first problem you said, where the watch would not run after you installed the stem, is directly caused by removing the stem with the watch not in the winding position. What has happened and is now the problem, is that once you took the stem out, the hacking lever slipped out of the clutch wheel, and when you pressed the stem back in, the hacking lever got in front of the clutch gear and is pressing against the balance ALL the time... THis is why the watch won't work... Because of this, when you removed and reinstalled the stem again, the hacking lever was pushing even harder against the balance and probably caused some damage. If you hold the movemnet sideways, look inside past the balance towards the stem and crown, you will see the hacking lever pushing against the balance...to fix this you need to take the movement apart on the dial side and reset the parts of the keyless works.... AGAIN, never take a stem out but in the winding position, on ALL movements... especially the 7750...normally on the 7750 the crown gear falls down also when you remove the stem in the time setting position, causing even more problems... Sorry but I have to run... RG

Normal as the asian models are indirect center seconds drive, if you watch the hand while it's going down with gravity it will hesitate, but it will be fine on the way up... Best to remove the hand and reinstall it in the correct position, pushing it is not a good idea. RG

For what you need done, that one will work just fine... By hand is next to impossible. RG

On the dial you have, with a flat paint finish, you can remove the oil and acid from your fingers and the Rodico will not leave any marks. On a Rolex Sub dial for example, or any with a high gloss, as soon as you touch it, you have to remove the finger print with the Rodico, problem is that now you have marks from the Rodico that you can't remove, no matter how hard you try...try it on a glossy dial and you will see what I mean... Acid and finger prints are on thing, getting the hands to seat properly with your fingers is a big concern, I cant' see how it can be done with fingers alone...too risky, especilly when the tool is only $10... Remember the golden rule of watchmaking (professional or amateur, makes no difference) - There are NO shortcuts - none.... RG

I have noted this a number of times as well... If the crown is stripped and you want a genuine one installed, you have no choice but to chamfer it as needed to get the tube to sit flush with the case...it will leave a small cut out on the bottom of the case, but what choice do you have? There are so many variances in these parts, not only cases but bracelet SEL's etc, everything is a different size and what worked perfect on one watch, is totally different on another... The fun and challenge of reps... RG

Very nice job...looks great. RG

Using a Bic pen will NOT scratch the hands, but for $10 you can buy the correct tool to install hands... A Bic pen is 100% better than your fingers...never use your fingers on a watch without protecting it from the acid on your fingers with watch paper. Touching a dial is a NO NO at anytime, never touch a dial - ever... Installing hands with your fingers is NOT recommended, in most cases, it will be impossible to get them to seat correctly. If anyone is going to use this as a guide, plse for your own benifit, spend $10 on a hand setting tool and do it the RIGHT way... Other than this point, nice tutorial and pictures. RG

A piece of the tube will normally stick out, hard to tell how much will be out on this one, it should normally only be about a couple of mm or so... RG

You should have a crystal press to install the bezel ring and the crystal, anything else is risky or won't work. Especially for the crystal, trying to install it without a press is almost impossible. The small tube looks like the crown tube, it needs to be pressed into the side of the case... RG

Not sure how I missed this post, wonderful job, they look fantastic... Well done. RG

Nice close up detailed pics, nothing like a genuine crown to finish it off... RG

Wonderful workmanship and nice watches and pictures. Great way to spend a day off... RG