Waltham Watch Model Database Post 1957

Hello All

I was wondering if anyone knows any resources for Waltham Watches post 1957 after their plant shutdown. There are a number of 1970s dive watches that are referenced by “B-“ but I can’t find any information about the model listings.

For example, there seems to be only 2 references online of the B-383 model (if anyone has one or knows where I can find one I’m definitely interested)

Thanks in advance!!!