So I've had people ask a lot of questions about how you take these apart and what you can do to them. There are some bonesey tutorials on doing vintage work on watches, but I didn't see one specifically aimed at how to take these apart. I'll try to tell you what I've learned (the hard way). This will look at breaking down the watch, drilling the lugs, bleaching the bezel, and replacing the plexi. Doing the dial stuff deserves its own tutorial. Let's get started. Here is a perfectly adequate and sound Comex vintage sub (why are we messing with it?)   I work on a desk with a very good light source, with raised edges to catch stuff that flies away. I also use a microfiber towel to stop stuff when it flies away. I use a visor with magnifying lenses on it that costs about $8 on Amazon. It and the light are my most valuable tools. I still crawl around on the floor a lot looking for stuff that flew away     Take the bracelet off     Take the case back off. I use a sticky ball. You could use a ball of wadded up duct tape or a real case back tool.     Case back is off, lets remove the gasket and put it away in a storage container.     Now we will remove the stem. Unscrew the crown and pull it out to the time setting position. Notice the round button to the left of the stem beside the gear wheel. Take the red screwdriver 1.2mm, or slightly larger and, while gently pulling on the stem, slowly depress the stem release button. By using at least a 1.2mm screwdriver you will have a hard time depressing the button too far. If you use a sharp pointy thing you will be exponentially more likely to screw the keyless and you will cry.     Now we can remove the movement. If I was going to remove the dial and hands I would take off the rotor by removing the screw holding it, but I'm just going to store it. I need to unscrew the movement screws and retaining tabs.     Remove the screws and tabs with tweezers     Now remove the movement by turning it out onto your fancy movement turnout thingy. I use a spool of thread.     Turn it over     Remove the dial spacer and place the movement in an appropriate holder. It is a good idea to reinsert the stem to keep everything in place. To do this just insert the stem and give it a slight twist as you press it in. A light touch is nice here. Notice that this gives you another opportunity to screw up the keyless so if you want to skip this step just set the movement in a safe place and move it as little as possible.     Now we can remove the bezel. Take a single edge razor blade and work it under the bezel all the way around. To lever it the rest of the way off use a case knife.       Notice you have the bezel and the ring that provides the tension off now. You have the crystal retaining ring and plexi left. We need to remove them.     Work the razor blade under the retaining ring. Once you have it up a bit you can use the case knife as you did with the bezel.       With the retaining ring off you should be able to push the plexi out from the inside. It should just pop off. It should not be glued. If it is hard to push out you can run the razor blade under the edge of the plexi to loosen it up. Now you have the disassembly of the case complete. You can remove the bezel insert by running the case blade under the space between the insert and the bezel. It is glued in about 4 small spots.     And its all apart!     Next up we will drill out the lugs, bleach the bezel, install a better plexi and put it back together. Stay tuned!