From your picture I can't really tell if it's aluminium or fiberglass boat? Here is a link to a 1959 Crestliner Catalog and you'll probably find your model in there. Ron
Here's is a Crestliner Restoration Site and I'm sure someone there can help you out with identifying your vessel. They also have catalogs from 1954 to 1964. It's the same site as above but is the home page. Ron