Could someone Indenify the Omega Movement for me what caliber etc..it measures 30mm or 13-13-1/2 and is a hunting case movement.

This Movement belong to a good friend of mine and is a family piece,it has a private label procelian dial and a silver wristwatch case.

The balance and staff are good and the train looks okay but the hairspring is toast..

any help would be appreciated.

under the dial