Ibanez 1977 'Les Paul Custom' law suit model - info???

Alright guys
A friend of mine has aquired the above guitar, serial number C771000, which apparently means it was built in 1977 in a factory which has something to do with Orville, i forget the name...
Its kitted out with p90's and a bolt on neck.
Does anyone know much about these things?
It plays rather nicely if im honest; has plenty of weight to it. Havnt had it through an amp as it needs all new electrics fitting, but i've definately played worse epiphones!

Any info appreciated!

Cheers fellas

the guys here are exteremely knowledgeable on all things vintage ibby

http://www.ibanezcollectors.com/

(got a 78 PF 200 - a cheaper, slightly less Gibson like follow up - really good guitars )

March 1977 (A=January, B=February, C=March etc, etc).

I have an Antoria Strat copy made at the same time, which is identical to the Ibanex Silver Series Strat. Bought it about 5 years ago and Goji filled me in on the factory and whatnot.