I'm a huge basketball junkie. I was given this as a gift by my ex basketball coaches wife. he passed away and she claimed there was an Oscar Robertson and Wilt Chamberlain autograph her husband had. she literally knows nothing about it other than he's had it "forever"

the autographs are all done in pencil. one is done in pen. i've personally identified and feel confident in a few of the autographs. I've identified the following:

Don Kojis

Happy Hairston

Jack Twyman

Bud Olsen

George Wilson

Jerry Lucas

Terry Dischinger

Oscar Robertson

Wayne Embry

Tom Hawkins

Jay Arnette

Dave Debusschere

There is a remaining 5-6 Autographs I can't seem to make out.

the autographs I personally identified/compared seem to be from the Cincinatti Royals and Detroit Pistons from the 64-65 NBA Season I'm assuming it was autographed at a game. she claimed Wilt Chamberlain was on it, and I did find one autograph that looks comparable to an Oscar Robertson Wilt Chamberlain Autograph paper I found online. but I'm not sure and I don't recognize other signatures from Wilts team at that year. 

anyways I need help figuring out the other signatures. let me know what everyone thinks and the authenticity obviously.

Here are the ones i've identified:

Here are the ones I need help with:Looks like the last name starts with an R or a K.

Not sure if this is 2 signatures. I thought it might be Jack Mcmahon. but i'm not sure. I don't understand if it's 2 signatures or just one full name.

If there is a Wilt Chamberlain signature on this magazine I would assume this is it. I'm not 100% convinced but it sorta looks similar to this signature of Wilt Chamberlain that I found online:

Can't make it either of those signatures. looks like the last name ...

Closer up of that 2nd autograph.