RWG Technical

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Very interesting Freddy. You must have had one of the better movements, being that it ran at 21.6k and had an actual microstalla balance wheel. Once I put up the pics you'll easily see what I am referring to with the balance and hairspring. If you can email me the parts list, I would appreciate adding it to my library, I already have some info on the V23/72 series, but nothing on the 727 ones... RG

Take it to a watchsmith, replacing the balance on any movement is an aquired skill, even more so on a 7750 that isn't completely disassembled. RG

The stem on this movement is a 1.20mm one... RG

Hour, minute and seconds hands will fit, the GMT hand will not fit, you need to source a new one. RG

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Well I am not sure if I am Brave or Stupid... I think my mind is where the reluctance lies, thinking I will look like a fool. I already considered some of the advice, especially "don't get caught gawking at the other women..." that is always a risk. The lessons are called Social Dance and cover a number of types, Jive, Swing, etc, so it should be entertaining. I am sure that by the end of the evening I'll have it all analyzed so it fits into my way of thinking. Maybe next time I am in NYC Kruzer and I can show off our stuff All I keep singning to myself is Frank Zappa's DANCING FOOL, god I hope they have a Disco ball... RG

I think they are in the $500 or so range...the prices have really gone up in the past year. RG

Welcome to RWG. If you follow the links to the sellers listed here (Josh is one of my favorite ones) you will have success in your quest. Ask questions and you will get answers, best advice is be very careful on the internet, there are many scam sites out there, especially for watches. Good luck. RG

Thanks for the vote of confidance. If you think "Elaine" on the Seinfeld episode was bad, you ain't seen me... Of course during my military time, with a dozen beer in me, I could make Michael Jackson look like a fool, if only in my mind. I am sure they will walk us "newbies" though the basics. I'll let you know how it goes. RG

It's all a learning lesson for everyone. If you can find any 2893-2's, that is your best starting point for any GMT model. Good luck. RG

Well, I guess midlife crisis has finally hit me. I am very nervous for tomorrow night, in fact I am sweating now as I think about what I am about to do... I must be nuts... I have... signed up... for... Dance Lessons (with J of course as my partner, she can dance already, I think she feels sorry for me...). I can't dance worth crap, and I believe this will be make or break test for our relationship. I figure if J is still around by the end of the first lesson, we can just about handle anything. I have warned her that if there is any laughing (including histerical on the floor rolling around laughing) that it's over... So wish me luck, 6 weeks worth starting tomorrow night, should be interesting, and probably amusing for some Now if you'll excuse me, I have to go polish my shoes, 1...2...3...1...2...3 RG

With a good pair of #2 tweezers, you can grasp the sides of the markers and twist it and it will pop off, make sure the tweeezers and touching the dial and are parallel and on the marker really well, only squeeze enough to not let it slip. You should be able to reposition them after you get them off, I remove them, scrap them, and make new ones with SL. Use only Hypo glue for attaching, since it won't damage the dial face if you get some where you shouldn't. Good luck. RG

I think I did a servicing on one of these not too long ago, before my France trip...but I can't remember for sure. I believe it was the same quality as the seconds at 3, meaning that it was fully jewelled and worked ok. So far the owner hasn't returned it for warranty so I guess it's still working. RG

Ok on the set lever screw. As for the stem, if the lever is just snug as you say, it should be fine...as for why the movement is stopping, very hard to diagnose without being able to handle and troubleshoot the actual watch. RG

Another great review, I will read in more detail tomorrow. Thanks so much. RG

Both issues should not be related. The problem right now is that the set lever screw, the one that holds the stem in place is loose, opening the caseback you can easily tighten it and fix that issue. If the stem is too long it could cause it to stop running when the CG lever presses it in place, but only if the movement is moving and jamming up... the CG lever should be snug, not tight with little pressure on the crown, if your breaking fingernails opening the CG, then you have a problem. RG

Hope you find someone who can help you out. I wish I lived in France...or the UK and could do the chunnel trip, but England seems to be too crowded these days. RG

I service and repair Asian 7750's all the time, and have done so for close to 4 years now. The quality is there, otherwise I would not waste my time, and my customer's money servicing a poor quality movement that would only have problems. Replacing the DD wheels is very simple and without any risk, heck I tear Asian 7750's down to the last screw and spring all the time, and amazingly once I put them back together, they work better than new In other words, find another watchsmith. He's clearly not looking beyond the actual job at hand. Very few reps have or have had Swiss ETA 7750's in them, the cost is much too high. But don't be discouraged by your Asian model, it's a great movement and should give you years of service with regular servicing. Even the Swiss 7750 needs regular servicing to keep running. RG

It means exactly what it says "Attempted Delivery" - obviously there was no one home, therefore "...item not delivered..." RG

Understood, it's not the first time we have been forging new ground RG

Just to clairify, dluddy sent me pics of the work he was needing done on the CG's, and having never seen CG's sharpened to a actual point, my interpretation and the work I did was to make them "thinner" when viewed from above, as I do on all the CG's I modify. I wasn't aware and didn't pick up on the pics sent, or the letter describing "pointy", so that's why they are not modified as actual points. My mistake, I did not know that there were actual CG's that were cut down on the upper and lower edges to look as they do in the pics... RG

I forgot to add, that of the new 28.8 K versions, I have seen at least 6-10 sub variants, meaning that they are all 28.8 K models, but there are subtle but significant manufacturing differences between many models, including the hand sizes of the chrono posts, some with fine regulators, some without, etc... Just when you think you have it figured out, it changes, again... From what I have seen, during the past 2 years, all of the A7750's being sold in our reps are the newer 28.8K model. If they want to call it "B1" that's ok, but it's really meaningless from a consumer point of view, maybe the manufacturer's call it this for some reason. I do have a lot of spare parts, the problem is the common ones (winding transfer gear, reversing wheel) are all used up and the ETA one's don't fit the A7750. Having said that, I did buy a winding transfer gear, and managed to turn down the pivots on the lathe so it would fit the Asian model, but if you add the cost of the part ($25) plus the time to modify it to fit ($25), it's getting very expensive to repair. The ETA pallet won't fit and can't be made to fit, so I have no choice but to correct the manufacturing defects, keep in mind were talking 1/100 mm adjustments here...very tedious. As for options, the good news is that I have figured out and can correct and get running the current A7750's. I am not always 100% successful and do have a few returns now and then, but the problems are always due to existing defects, not the work I did or didn't do. And sometimes no matter what you do, you get a defective movement that you just can't get to work right... For a standard 12-9-6 layout, replacing the A7750 with an ETA is good value, but only if your planning on keeping the watch. The cost of the ETA is very high, and add to that the installation cost, and the cost of servicing, and your well into $700 or more. I say servicing since many of the ETA7750's sold are surplus movements and need servicing to get them working. Best value for the money (my OPINION only) is to service the Asian 7750 within a year or so. And on any dial layout other than the standard 7750, it's your only option. I can count on one hand the number of A7750's that have been sent back for warranty work over the past 24 months...that tells me a lot about the reliability following servicing. RG

As far as I know, there are two main variants of the A7750. Variant #1 is the slower beat 21.6K version. This version has the same sized chrono hands as an ETA 7750. Variant #2 is the faster beat 28.8k version. The majority of these versions have chrono hands that don't match the ETA 7750, normally all the subdial and center seconds hands are 0.20mm size. The sub variants designated by the various letters are (if I remember correctly) a brain child of Eddie Lee...my response when the different letters were starting to be used was "B1, B2, BS..." it's meaningless. Some clarification on the serviceability of each variant. The older 21.6 K version did suffer from dirt and lack of proper servicing, but the new 28.8K version is overall in worse condition than what it replaced. While the 21.6 K version was dry and dirty, a good cleaning and oiling and it was out the door. The newer 28.8 K model however is prone to be soaking in oil in and around the mainspring barrel, it has a number of manufacturing defects, almost all of them have defective escapements and require a lot of time to get adjusted and working correctly. Many times I can't get the pallet adjusted correctly and have to replace it with a spare I have. So while the newer version does look better and is finished better, the tooling it's made on is defective and each and every one coming off the line has problems that need to be fixed. I just wish they would fix the problems at the source so I don't have to spend hours adjusting and correcting the induced defects. RG