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One of the great things about collecting and repairing is that feeling of taking a bunch of parts and making a working watch again. This restore begins with a scrap pile of cases from a former Timex repair center. I chose a late 1960's Marlin case that is missing the stem tube. So to the parts stash and one issue resolved. Off it than goes to get a bath in cleaning solution , polished, new crystal added along with correct case back. Next I service a used #24 movement also from the same lot the cases came with and the assembly begins. Since the hands are chromed, I just use an old eraser pencil to bring back their shine. The sweep comes from NOS stock. Grease the stem tube, set lever, insert a NOS stem\crown, snap on the case back and there ya go. Will give this one a wear to test its time keeping.

This might interest some here... Program on Chan 4 on Sunday 12th at 9pm Looking at the adverts they totally disassemble the mechanism. http://www.radiotimes.com/tv-programme/e/fy9zwy/big-ben-saving-the-worlds-most-famous-clock/

Wis, I think it may be an Electa movement. Check this out. http://www.vintagewatchstraps.com/gallet-electa.php

This popped up on ebay last week as a £50.00 buy it now During the Great war the British military had been issuing pocket watches to serving personnel and hadn't supplied wristwatches, these where instead bought mainly by officers privately for use at the front lines with wristwatches improving and the introduction of the water resistant cases, unbreakable crystals and radium dials the Trench watch was born and became an item of necessity for serving personnel. It wasn't until 1917 that the war department purchased the first batches of wristwatches supplied in two forms the first being a classic trench watch of water resistant case, black dial with radium numerals and unbreakable crystal and the second type being a large cased snap back, black dial with radium numerals all had 15 jewel Swiss movements. These watches where purchased for the purpose of evaluation to assess the usefulness of issuing wristwatches to serving personnel. This watch is of the snap back type and has a unusually large for the period 38mm case made of nickle, the dial is black enamel with radium numerals. All the snap back models have issue numbers that follow the same form a five digit number beginning with a nine followed by a letter M there is also a Broad arrow mark or Pheon crudely stamped on to the back some watches are stamped with two broad arrow marks that touch at the tip this is thought to indicate that the watch had been withdraw from service. The movement in these large snap back models is the same in all known watches where as in the water resistant 1917 watches there is some variation. The movement is a good quality 15 jewel movement and no one has yet been able to identify who manufactured them there are no identifying marks but there is a brevet patent number on the dial side so it may be possible to trace that and establish who made the movements. No one is sure what branch of the armed forces these snap back watches where issued to but it cant have been to front line personnel because having no water resistance would have rendered them pretty useless in the field, many have speculated that they could have been issued to the flying corps because the design mirrors quite closely the pocket watches already issued to them at the time, these snap back models where only issued in 1917 and withdraw from service shortly after, but the water resistant watch became a regular issue watch there after It is however an interesting footnote in the development of the military wristwatch and is amongst the first officially issued and stamped British military watches of the Great War.

I use Jules Borel, Cousins and Boley to identify case parts. Usually in that order. In this case, Jules Borel gives you the most comprehensive list of case parts, but none of them list a wavy washer and pictures I see elsewhere suggest it doesn’t have one. http://cgi.julesborel.com/cgi-bin/matcgi2?ref=Ome+cs%23165.0070&submit=Search Cousins has illustrated parts lists for almost every Omega calibre in their documents area. They also appear to have access to the Omega extranet, which is restricted, but enables them to look up the information you are seeking.

Could not find exact 552 service but found this: Link; https://thewatchbloke.co.uk/2015/04/29/omega-seamaster/ Parts list 365_Omega 552 NewLR.pdf

If you can’t find the parts you need then there are a couple of options... New movements are still out there, e.g. http://www.startimesupply.com/product/ISA0228-1332.html If you don’t want to spend that much, then use the datasheet and find a miyota (or similar) replacement http://watchguy.co.uk/technical/ISA/228-1332.pdf

Unfortuantly the forum doesn't allow sales or wants threads my friend, that being said, I would trawl ebay and find one on there that will sort your needs out. One will come along sooner or later, in the mean time buy a few old watches off the bay so you can practice tinkering before you start trying to get your new purchase running. If you have any questions then ask away, plenty of very experienced members on this forum.

This is how i check for magnetism and how i demagnetize a watch with my DIY device: