start googling and searching, here's something from this forum

http://www.catsailor.com/forums/showflat...amp;Search=true

some specs here if you scroll down

http://predatortri.com/Catamarans.html

some results from manufacturer

www.g-catmultihulls.com/misc/winnings.html

for sale

http://www.sailboatlistings.com/view/3494

at a guess it looks a bit like a prindle 16

which would make it a great starter cat

condition is everything on a 20 year old boat, if it's got inspection hatches get a light in there and have a very good ;look around in case the rebuild has covered some things you'd rather see