Yeah.... not really. The 1950 Ford I learned to drive in had the optional add-on signal box that had been purchased and installed by Sears and Roebuck. Turn signals didn't become a requirement on new cars till 1954.

Not that the actual date matters.... in casual conversation or on a forum. Same with proper hand signals. Meaningless in most cases. BUT.... if you're in a accident after (or as a result of) an improper hand signal..... your at fault.