Found my grandfather's beater.
Blue/silver dial. Square lumed indices. Day/date.
Still works. (accuracy to be assessed)
Bracelet says 100% stainless steel.
Back says 5 atmos, incabloc, antimagnetic, has the number 12015 engraved.
I want to know more about it. I really loved my grandpa and it will be a great honour to restore and wear his daily beater.