Thanks very much for the input, you were mentioned by name on WUS as someone with knowledge of these.

If the bezel is a later replacement, would that make finding a replacement insert easier?

I'll keep an eye out for those bracelets and check out chronodeco too, thanks!

: Hi Doc,
: Nice looking Monnin. The bezel may be from a later model as it has
: a tramline bezel - i.e.. with a metal ring between the glass and
: insert, but this is no big deal.

: Servicing wise, I use places in the UK, but I'd imagine any good
: watchmaker can service this movement - many US Heuer collectors
: use Craig at chronodeco.com.
: As for the bracelet - Rolex Sub bracelets fit, but as they cost an
: arm and a leg, find a good quality aftermaket one designed for a
: 5513. (go one ebay and search for '20mm submariner oyster' You
: should find some ranging from £20-£40)

: Stewart
: - Heuerville