Fantastic work here!! I am traveling, and not in a position to fully analyze and explore this, but I look forward to doing so.

Amazing that this community produces such information through this style of collaboration. Well done!!

Jeff

+++++++++++++++++++++++++++

: I'd like to make a small amendment...

: Crowns.
: Seems that the Montreal 750.503N Convex barrel case also had a
: signed crown. (as did its blue dialed brother the 750.503B which
: had a convex case too)

: Stewart