Need some help Id'ing a family heirloom. This Eterna belonged to my grandfather and was passed along to my father who has now given it to me.
Looking up the serial it looks like its from 1948-1949 and the fact that it says Staybrite on the back leads me to believe it's one of the earlier Eterna-matic watches released.
I've got a pretty good feeling the strap is aftermarket as I can't find any pictures online of this style of watch with this type of bracelet.
Any ideas as to what i have? Watch seems to run fine. Thanks in advance!