RWG Technical

As already stated, the 7750 is an odd movement in that stems are available in both 0.90 and 1.20mm thread sizes. And yes, the ETA stems fit the Asian models perfectly, no need for any adapters. RG

I am so glad to hear it's found a new home with you, congrats and wear it well. RG

Without a clear picture of the movement, it's impossible to say what it is...I really doubt it's worth anywhere near $500, let alone $2500... No markings on the dial, all makers identified themselves on the dial face, it's certainly not a minute repeater and from your pictures I would say a low grade movement at best, it's not even all jewelled on all the pivots. The case looks very worn and not in really good shape. If you can identify the maker and serial number you can get an accurate price. RG

Wow, thank you so much everyone! Rob told me to look on the forum...I certainly wasn't expecting to find this, so what a pleasant surprise. Makes the whole idea of getting older not so bad afterall! Many thanks for the humour and birthday wishes....you fellas are great. ) cheers Jennifer

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Reminds me of my 1962 5508 that I sold last year...very nice, can't wait to see the end product. RG

Household vinegar does exactly the same trick. I had to sell my genuine Airman 7, much much too big for my wrists... RG

I don't suggest you start with any asian automatic movement, your sure to throw it against the wall in frustration and give up hope. These models have one big honking bridge that covers every gear and pivot, next to impossible to assemble, I don't waste my time on these, much too frustrating. The 2836 series is a great starting point by following along with the TZ course. 20-30 teardowns and assemblies and you get the feel for how it all works, and then with the help of the ETA teardown PDF docs, you can tackle a 7750. RG

$16 is an amazing price, I have even gone direct to PTS resources and never got a price near that. It would be worth spending $100 on a few of these and see what you get, easily sell for $50 and up, even $125, as an economist, it's probably the only thing going up in the market lately RG

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I like to call my watches hommage or novelty items. I have never claimed that they were anything but what they are, if I have modified or upgraded a particular watch, I mention that. But I never say it's a genuine one, because it isn't, nothing to gain by lying. No different than driving a kit "replica" car, no one would think any different of you if you had a Speedster based on a VW Bug chassis... RG

I buy all my watch material at wholesale prices. An Asian 7750 sells for $125 wholesale, not $16...not sure where that pricing is coming from, but that is well below any wholesale I have ever seen. The rest of the pricing seems normal, but your forgetting that you need dials, hands, someone to assemble the parts etc. I don't think it's that simple or easy to do, a generic watch - maybe, but anything else it's not going to be possible. I find it interesting that a bicycle shop has access to not only a catalogue of watch material, but wholesale prices for watches, when he's not a watchmaker or jewellery shop...I wish I had access to these prices and parts... RG

Unless you have experience in watchmaking, this is not a do-it-yourself repair. There are two parts that have to be fixed, 1. the click spring for the reversing wheel has to be adjusted correctly into the gear, and 2. the spring, if it's loose, has to be glued into the bridge. To do this requires taking apart the movement, and if your not a watchmaker, you will never get it back together. RG

I personally don't believe there is anything "new" at all...still the same old A7750 we have seen for years... In other words, you didn't get the wrong movement, because there is no new movement available. RG

Since this has been a common problem on the A7750, I have devised a fix for the original cannon gear. If the gear is beyond repair, I do have spare A7750 ones I can use, or in some cases I will install a ETA one. The common problem seems to always be the post on the great wheel that the cannon gear presses onto, it's usually slightly too small, and the gear slips on the post. I would say the ETA parts tolearance are correct, the variance is the A7750 parts. RG

I only use my Ultrasonic machine to clean watch parts during servicing. All the cases and bracelets are cleaned with a fingernail brush and warm soapy water. RG

Can't wait to see the new straps. RG

I am glad you like the results. On the test bench right now, if all goes well after the servicing, it will be this week's shipment... RG

@ all, thanks for the feedback, I was a bit nervous on doing this one, not having any idea how it would turn out, but I think it looks great. Answer's Only know of blue or green glow lume, no gold but there is a yellow colour on the tritec listing I do stock this lume now, no extra cost, same price as the other lumes. I bought some to experiment with, and really like the results so far. Interesting on the colour underwater, makes sense to me. I grew up in a small fishing town, our seaweed was every colour, including green, but I still prefer the blue on this one Sorry, no pics of the process, especially the bezel, it's like sex in a way, once you start, you can't stop till your done...over an hour just to get the triangle and 0-15 area done, by then my nerves are shot and I need a couple of hours to recover. It's very difficult to do, especially the small bezel numbers, not a lot of room for error. Thanks again for the feedback, lets hope the owner likes it. OOOPS, looks like the owner stepped in while I was typing. RG

According to the RC Tritec charts, C3 which is the brightest lume of all rates at 100%, BGW9 (Blue C1) rates at 95%, and C1 (green glow) rates at a measly 31% brightness... It's bright...at least according to RC Tritec... RG

One day in heaven (near the pool I suspect...) "Mr. Cousteau, I have news for you, they have made a watch and named it in your honour..." "This is wonderful, tell me how it looks" "It's a nice dive watch, with a chronograph and a waterproof strap, you can even see the time under water because it glows in the dark" "Amazing, and what is the colour of the watch?" "The watch has a blue dial..." "Blue dial, in honour of the ocean and all it's beauty...and the glow, what colour is it? Blue like the dial??" "No it's not Blue, sadly they messed it up, it glows.........green..." "GREEN! Mon dieu! I am not a landlubber, trees are green, I am a man of the Sea, the water and the sky are BLUE not GREEN...sacre blue, this is terrible...if only there was someone who could help us..." "I know, lets send the watch to Ziggy, I understand he can fix the lume and make it blue" "Really, that would be wonderful, there is hope after all..." So Mr. Cousteau, this one is in your honour for all you did. First up, daylight shots, this is BGW9 or C1 with a Blue Glow. All of these pictures are done with a fixed exposure of 0.5 second. No cheating with long exposures to make the lume look like a nuclear reactor gone bad, or with "Turbo" lume...or other such nonsense... Subdial hands are lumed in Super Luminova Orange (chrono seconds and chrono subdials), hard to see in the pics as it doesn't show up well with the blue overpowering it. Thanks for looking. RG

I am glad to see your putting some time and effort into mastering this difficult skill. Honestly, I think the dials look terrible and the watch is ruined. I would not want to wear a watch that looks like this. I am not trying to insult the fact your trying this out, but you should not be applying lume to a dial that is for wearing on your wrist until you are skilled at producing very nice results. You need to buy some old dials for practice, the saussage dials are the most difficult and you should have some of these as spares for practice, it will take you at least 50 or more hours of constant practice before you get the required skills and knowledge to make it look nice. I know this because I started with lume 4 years ago, but I had a good background and was an artist for 30 years and have been working under a loup for a long time. Even with that background, it took me many dials and about 6-8 months of practice to get skilled at applying lume. Until I could make it look acceptable, I didn't do any watches - only practice dials. Applying lume requires two skills, 1. being able to work under a loupe, and 2. having an artistic skill to apply the lume so it looks nice. Keep practicing but please - buy some old dials for teaching yourself how to lume before you do someone's watch. As for a template, this will not work or fix the problems you are having. Practice and more practice is the only way to get good results. RG

Glad to be of assistance as always, and your right, without J doing her part none of it would be possible. RG

This couldn't come at a better time. We are having a get together on Saturday night, and although I already have a wonderful GF, this will come in handy when that inevetable lull in the conversation comes up. RWG and it's members continue to raise the bar in quality of everything, even the gen sites don't have anything even near to this quality and caliber of writing: funny, informative, clear, well researched... Even magazines such as HR Watches can't come close to this quality of a technical user article. Well done again, thanks so much. RG