the boat is Definately a 1959 model, they changed the design of the hull for 1958, the one's that were made in 1956 and 1957 were the original hull design, quite a bit different than the 1958's. The 1958's were, in my opinion, the most desired because of the swept fin's, and the aluminum fin cap, like Jerry's, the 1959 models had a strait back on the fin, the 1960 model were completely different. I have had two of the 24 made in 1956 with the paper tags written in pencil under the rear deck, but as already stated, the 1958 and 1959 models had the numbers stamped into the rub rail on the port side near the stern.
I don't know about other states, but here in Oklahoma, when I get a boat that is mis-matched for the proper year, I sent the state a form from my local tag agent, called a BM-24 to correct a "typ"o"
and that has worked many times, but when the boat don'e reveal any numbers to insure that, I make my own, on a strip of aluminum tape, file for a, what Oklahoma calls a Title 42, storage lein, and I get the paper work in the mail in a few weeks, take that to the tag agent, and get the correct title for the boat.