

That is an impressive good looking watch, mate. Make sure you post some pictures on your wrist later.
With regards to your question. I haven't heard anything bad about this particular movement at all. It is basically GP's in-house GP3300 base movement + GP's pattened power reserve module. GP3300 is the improved version of the original 3000 series which has been around for >10 years. It's a fine yet reliable movement and most of the minor problems with the earlier versions have been dealt with. My Vintage which uses the same base movement has been keeping time well. There's an in-depth article about the GP Vintage 1945 Big Date Moonphase which also houses this base movement in the review section. Also posting your question in the dedicated GP section of this forum would be a good idea as I'm sure Peter and other fellow GPér are more than happy to help you. Enjoy your watch.
