I'd been searching for information about this dial on a 5513 with a case-back dated '67; serial around 2M. I'm really feeling appreciation for all of the forum contributors over the years, and also for RichardC who generously runs this site so I can slog through the old posts. Thanks all!
I finally found the right search terms

- feet-first,
- closed "6"
- aligned "f" and "t" crossbars
- two-lines,
- depth on top
If it is original, it would be a transitional period, Mk 3, ft-first, LC made dial. Seems to match date and serial range.
Did I get that right? Is it rare?

One wrinkle with this watch is that it has a movement with 1570 on the bridge. So either someone (a) installed a new bridge during a repair, or (b) swapped in a newer movement.
Is there a basic way to identify an underlying 1520/1530 movement? Has anyone encountered other 5513's (without serialized movements, I believe) where someone just swapped in a 1570?
