Help finding bumper movement

Hello all my name is Cesar and I was hoping to get help getting the correct movement for my watch. Awhile ago I purchased a project watch with a rusty movement and I was wanting to restore it but after talking to some watchmakers they advised me to find a replacement movement. I’ve looked up my case reference 2398-2 and the web says use 30.10RA also known as “330” my question is are there different 30.10RA movements? Is my watch 310.RA ? I don’t see any markings yet other than the serial number. Any help would be appreciated.

Look under the balance wheel. Caliber is there.....