Please help identify Omega watch.
On the dial there is only text "Anti-Magetique"
Inside the back cover - serial number "P 3256160", sign "Omega", mark "0.935".
Inside the movement cover - "P 3256160", "0.935".
On the movement there is no serial number, only text "Omega" below the FA and SR.
Can you suggest what is the year, and also the model (if there were models) of this watch?
Also - is it normal that there is no "Omega" sign on the dial, and also there is no serial number on the movement, only on the covers?