1973 sf giants auto baseball is it real?

I think that I have a team signed 1973 sf giants auto baseball. I think That it is from 1973 because it does not have Willie mays but it does have mccovey who is on the sweet spot. I am wondering if it is real or if it is a facsimile team signed ball. I think that it is real because the inks used to sign the ball appear to be different. I was wondering if anyone knows of any facsimile signed balls that were produced. Thank you for your help