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Hi! I have been working on this beautiful Sandoz Submariner ref: 3933-D-77-2 in really nice condition. While servicing it however, I realised that the crystal was cracked and it broke shortly after. I have been searching for an Identical replacement but I simply cannot find one to save my life. It has this pretty big tension ring as well. I have found some generic rolex replacements which share the same outer diameter measurements but none come with a tension ring of course. I will be listing some crystals I have found and some measurements of the original crystal and ring. Is there anyone that can tell me whether I can fit the tension ring in these rolex replacements and use one of those. Or even better, where I can find an original replacement for the Sandoz. Sandoz original glass measurements: width - 30,3 mm, height - 6,1 mm. Tension ring width - 1,5 mm, tension ring height - 1,5 mm. Some replacements I found: https://www.ebay.com/itm/123793378821 https://www.ebay.com/itm/123300572660 https://www.ebay.com/itm/310348420078 http://www.classicwatchrepair.com/english/shop/rolex-1680-submariner-replacement-domed-plexi-crystal Any help would be extremely appreciated. I really would like to get this watch looking and working nicely. Best regards(:

Forgive me if this is a dumb question. I'm currently working on an AS 1187 1194 movement which has a broken mainspring. I have a bunch of NOS mainsprings and would prefer to use one of possible. After looking into it, it seems the proper mainspring size for this movement is Denn. 6 x 11 -- 11.5 I've got ones close to that but not exactly that. So my question is, is it possible to use a mainspring with a slightly different width, strength, or length? Is there more wiggle room in regards to any measurements in particular? (by that I mean, maybe there is no wiggle room in width but some wiggle room in strength etc) I've attached some photos with ones that seem to be relatively close, and am wondering your thoughts on using any of them? This is for a personal project so I'm looking to spend as little money as possible, otherwise I would buy a new mainsprings from Jules Borel. Thank you for any help you can give!

Hello! I've been having trouble with an Elgin 554 movement but am eager to wear the watch so I attempted to swap the movement with another strong running 554. However the trouble 554 and the strong running 554 are for different dial types (trouble 554 is for a flat dial, running 554 is for a curved dial). I assumed that I would be able to just swap the cannon pinions and hour gears, however I found that the center wheel pivot was a slightly different diameter. The curved dial cannon pinion was much too lose on the other center wheel pivot and the flat dial cannon pinion was much too tight on the curved dial center wheel pivot. I was surprised that the pivots would be slightly different diameters for the same (554) movement, BUT I'm also very new to this and wanted to ask two questions: 1) will also swapping the center wheel between movements fix this problem? And 2) is this a common issue I'll find when trying to source parts from other movements of the same caliber? (Apologies if any of my terminology is wrong) Thank you for any help!