I’ve now had it serviced and put a proper DON bezel on it (serial number 28428149 says that’s what it gets). It’s been running within COSC standards this last week.
Getting it ready to move it along. I can’t keep everything. But, parting is such sweet sorrow.
Thank you & I'm not sure either ,but the watch just grabbed me as soon as I saw it in the jewellers window . I think it could be the dial ,as it just works perfectly in all lighting conditions .