Sorry mate. Spend too much time looking at your pics and not what you've written. Hope you don't mind.
Your movement has a GP3300 base movement which is designed and manufactured in-house. It is basically a evolution of the original GP3000 movement which deput in 1994. The big-date mechanism with a clear disc over a base disc, so there is no central slit is again a GP invention. The off-second with moon-phase and power reserves indicator is also GP's own module I believe.