It doesn't strike me as a US made unit, though I could be wrong. And the drum is reminiscent of some older Pro Furl units. From way back in the day. Thoughts?
Are all of the fasteners on it metric? And where are you/the boat? Also, where does the boat hail from/was she built?
With a bit of luck those questions will help a little. Though a consultation from a rigger would likely help a lot more.
One other thing to look for would be any serial
numbers on any of it's components. As they can help in it's identification.
BTW, what issues are you having with it? And what are your plans for it... in what kind of time frame?