Is it even possible to get a WG CNC case made? I have seen that done for the Nautilus and a few others but never for the 5226g. Where would you even start if you wanted it done?
A CNC case is possible but would be a lot of work. It would be better to just white gold plate the rep watch. Here's how I did it.
First of all, to disassemble the watch, it's a top-loader, so you have to remove the top bezel and crystal. Thankfully, there is a groove in the bezel, which should be at either six or twelve o'clock.
Use tape or plastic to protect the surface, then gently pry it off with a case-back tool.
Once the top crystal is removed, remove the hands and the dial to expose the movement ring underneath. Four long screws hold the movement to the mid-case and the bottom case (lugs and case back). Loosen these screws and tip the watch over while supporting it with a watch cushion. Take the bottom case off. Gently remove the crown and stem by pushing on the stem release button, and the mid-case will come off, leaving the movement in the movement ring and the mid-case free.
All told the case has three parts: the bezel and crystal, the mid-case, and the bottom case. Sorry, I forgot to take pictures of the individual pieces.
Now you're good to go for plating, and it also exposes the movement regulator for fine-tuning and rotor silencing. I was pleased to be able to dial the Miyota in pretty well.
When reassembling the watch, align the notch under the crown at the 3 o'clock position. I got this wrong the first time and had to reverse my progress to fix it.
Here's how mine turned out.
