Dr No[Moderator Omega - Wristscan]
37710
Fascinating! And I knew none of this . . .
. . . until now.
Omega's code would've been OXG, which can be found engraved on movement bridges from the '40s to the '60s. (Never observed OXW.) I'd assumed the engraving was a tracking system established by Omega. That it was legally required never occurred.
Thanks much,
Art