Omega watch authenticity and identification

Hello fellow vintage watch lovers,

I am the new owner of a Seamaster 30 from 1963 and now I am considering buying another Omega vintage watch. I am looking at one but think the dial logo and seconds hands both look a bit odd. Also, there is neither a number nor a hippocampus on the case back, however there is a number on the inside of the case. The movement is 286. I have attached some pictures.




Can anyone verify the authenticity and provide any other details about this model?

Many thanks.

Yes, the watch looks ugly. Are you going to wear them or are you just adding to your collection?