I agree about it not looking like a Luger.. quite a modern underbody. Any idea on the year it was built?
The aft port in the cabintop, being so far aft is rather distinctive.. maybe someone will recognize it.
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)