I've just recently had this serviced so I'm wearing it a bit more.I'm struggling to find any information about it. I have never found another one like it.is there a catalogue online somewhere?
Thank you. I'm still struggling to see where my variant fits into the range. It's closest in the dial too 3663/9. Straight date window and similar hour marks. However, that is a 725 and 17 jewel. The 25 jewel models are different and strangely have a lower model number). Mine seem to fit somewhere in-between