Re: How to find if boat is one of a kind or rare
Pretty tough to do. Some folks have luck contacting the owner of the closed company, starting with information from the MIC index. Otherwise, unless you can find some sort of fan club for that boat on the web, you'll probably be out of luck.
There have been so many small boatbuilders out there that close and disappear completely over the years. The 60s was especially bad about that, since everyone and his brother-in-law started chopping glass back then and putting together boats. Many had only regional or even local sales.
The place to start is in the area where the boats were made. Sometimes a local historical society can give you some information. In some cases, they even have the records of companies that used to be in their area.
It's a treasure hunt, with no map and no directions.
Good luck!