I’m not an expert on it, but using my light box near a north window (not using artificial light) produced nice colours without glare or shadows. There is a good thread about colour accuracy here. I am now looking for a grey backdrop https://omegaforums.net/posts/1313077/
Nicely done. Good photography can be tricky, especially to show the technical beauty of these watches. Your pics sure beat my flashlight and iPhone pics!