78 goldenstate warriors?

[Sfgiants]

i belive this ball is from 71-72 but the signatures are from the 78 goldenstate warriors including rick barry i belive that was last year with goldenstate. would like some info on this my buddy wants to sell it... he aquired this ball back in 78 when he was in highschool they were giving it away to the winner of a contest and my buddy won it. he has had it in a box this whole time. ball looks brand new in such good condition. i belive its 77-78 team because Ray Epps was Drafted by the Golden State Warriors in the 5th round (104th pick) of the 1977 NBA Draft, and Rick Barry left before the 78-79 year.Here is list of names on ball.

rick berry
nate williams
e.c. coleman
rickey marsh
phil smith
ray epps
sonny parker
wesley cox
charles dudley
cliff ray
rickey green
and coach Al Attles

pictures of Ball here
http://s1159.photobucket.com/albums/p634/reapersmist/