At least 3; the one they raised and the two I photographed in 40m of water just off the former seaplane base in Trondheim:-

http://www.flickr.com/photos/simonbrownimages/7141966697/in/set-72157629599163242

And the second:-

http://www.flickr.com/photos/simonbrownimages/6995879666/in/set-72157629599163242/

Its safe to say the one raised is in far better condition…

Nice parts source anyway 😉