My grandfather passed away a few months ago and I found this watch in his collection. It is obviously quite damaged, has lost its crown, and has lost the original strap, but I’m wondering whether it’s an authentic Omega Seamaster. I think it’s probably from the early 60s. Can anyone identify it? Any thoughts are appreciated, thanks

https://preview.redd.it/c6ib7nkwhwzb1.jpg?width=2132&format=pjpg&auto=webp&s=ed755982193a502f91756bc549104d9e2b84b671

https://preview.redd.it/8wzapnkwhwzb1.jpg?width=3024&format=pjpg&auto=webp&s=fe46a8279f1b1fdabf99e4445563fee5d8f01df3

https://preview.redd.it/qkhxyqkwhwzb1.jpg?width=3024&format=pjpg&auto=webp&s=013a9bc6c92ec42479897de82373debe810dc563