I've found numerous markings behind panels and furniture. Mostly "36 motor" or "36 trawler". I believe the early sail and power boats shared the same hull, hence the markings.
By the way, your rudder post set up appears to be identical to mine, though I have two. I'm sure they used as much common items as possible.
"Keep putting off till tomorrow, and you'll end up with a lot of empty yesterdays" Prof. Harold Hill