There's a good chance it's made by Scandvik. They make a lot of marine plumbing fixtures.
http://www.scandvik.com/index.cfm?method=home
It's a big website and you may have to do some searching to find what you have (or want). They also sell replacement parts (hoses heads, etc.) so if you see what you have on your boat but just need a part you can call them and ask about the replacement parts.