IDing a vintage gold Omega?

[darthdeepstate]

Hoping to get any more information about this 14K gold Omega that my late grandmother left for us. I know nothing about it. On the clasp it says 891.332.CA. Thank you in advance!

 

[X350 XJR]

If you gently apply upward pressure to the crown the movement should separate from the back and the information on the inside of the case back and on the movement should reveal all.