GleaveandCoLuke

The crystal you need is PZ5083 if your case is 166.144. Check the case number on the inside of the caseback. You might find it hard to locate a genuine glass, we sold out a while back. We have the generic verion here: https://gleave.london/glass-omega-pz5083-steel-ring-xac-330-552-generic/ Other suppliers will also stock this generic one or you may be able to find a genuine one on ebay.

It is an English gold case. The case numbers often don't show anything for the crystal. My guess would be sternkreuz ATG or ATGR 316. We, and other wholesalers, stock these crystals. You need to take the old crystal out first and check/measure to be sure. Measure the diameter. Then check the gold tension ring on the under side, if it has a tiny cut out/step to make room for the dial then you need ATGR, if not then a normal ATG is fine. If yopu haven't replaced a crystal before I would take it to someone that has as it is easy to do a lot of damage and you don't want to do this to a gold Omega. Luke. (seen hundreds, maybe thousands of omegas for crystals over the years at work).

We supply this as Omega 330 (= 28.10) and our size is 1.10 x 0.095 x 300 x 9 (auto as it is a bumper movement), with no issues. So can't say it will solve the problem but using that size spring should be fine.

That's great. thanks so much.

Hi, does anyone have the chronograph.pdf attachment listed above. Just doing some reseach into this calibre and can't find much on the internet for parts sheets etc. Many Thanks.

Here is a guide I made. Firstly it looks like your old movement is 2 Hands, secondly your date disc looks damaged so I would reuse it. Secondly I would strongly recommend replacing it with a 956.112 rather than a 956.114. 956.112 is 95% the same, completely interchangeable, it is simply the updated version and therefore a better movement. If you had a power extension lead from 1990, you wouldn't replace it with a new old stock extension lead also from 1990. The movement will be old and the oil likely to be gummed up. The new version will be fresh and manufactured within the last year or two. 956.114 will be second hand and/or have been sitting in stock for 15-25+ years. Finally your movement is likely to be standard height unless the dial looks unusually thick so not need to worry about this.

Here is a better guide I made.

Follow these steps... Does it have a second hand... Yes = 3 H = 3 Hands, No = 2H = 2 Hands Where is the date... At 3 O'clock = 3D, at 6 O'clock = 6D Remove the old hour wheel and measure the height with a vernier gauge, if it is between 1.02 and 1.10 then it is normal Height. Otherwise you will need a high or low version. 75% of the time you will have the most popular version which it 955.412, 3H, 3D (Normal height, not HT0 or HT3) So that is 955.412, 3 Hands with the Date at 3. Suppliers all round the world will stock this version. Simples :-)

The correct replacement for this is not 255.112. This is the wrong diameter and thickness. 555.415 = 955.412, 955.412 is the same movement essentially just a few updates over many years.

They should still be spring bars, just a different type without a shoulder. They are usually used when there are drilled lugs like this, but always be very careful before cutting out. Old watches, often gold cases have fixed bars but they are usually obvious. Very rare to find fixed bars on something modern like this with a relatively modern quartz movement.

From experience I would say that this is 99% a non-telescopic spring bar. See this picture. http://blog.esslinger.com/wp-content/uploads/2014/06/single-shoulder-spring-bar.png Usually they are used in watches with holes drilled right through so they can be removed by pushing a pin in from the outside. However some watchmakers like them as once they are in, they won't come out... unless they are ripped or cut out. So the solution is to cut them out and replace with a normal spring bar. I would say I have to cut these bars out for maybe 1 in every 50 straps I change, so the issue does come up. However you need to be sure. Fixed bars would be very unusual on a watch of this style and age. Does the bar twist? If so then likely spring bar. But cut at your own risk as cutting bars on a case with fixed bars will screw up the case.

Hi, I have had a good look and found one of these in our stock. £3 plus vat. 0207 253 1345

The symbol in a circle on the front of the movement is for Lanco = Langendorf, So it's a Lanco 1078A I think, not very popular.

The twisted stem for ETA 2824 ( not ETA 2824-2 ) is obsolete and very hard to find. We sold out many years ago. A simple and cheap solution is to change the stem, winding pinion and clutch wheel, all to the 2824-2 parts.

http://gleave.london/date-jumper-spring-eta-7753-2575/ Have added it to our site. In stock.