Faded signatures on 1977 Yankees Ball

[layla]

Hello everyone...I am new here. I would like to take this ball somewhere to be looked at but only venturing out on a "Needs" basis (social distancing). So, hubby suggested I try a forum. Appreciate any comments and opinions on this...
I have a Yankees signed baseball with REALLY faded signatures. Based on the signatures I was able to identify, I think it was 1977.
Originally, I thought it could have been 77, 78 or 79 based on the 1st few players I was able to make out. But then I researched Dave Kingman and he did not play in 78 or 79 for the Yankees...so, that means it's 1977? (hope my research was accurate)
There are some names I cannot read, but here is the list I have so far:
Roy White, Chris Chambliss, Bucky Dent, Reggie Jackson, Ron Guidry, Dave Kingman, George Zeber, Lou Piniella, Fred Stanley, Sparky Lyle, Cliff Johnson & Mickey Rivers.
The pictures I am posting are in duplicate. Color photo shows how faded they are. The black and white is helpful to make out signature. I have to attach separately
Is a ball this faded basically worthless?
Appreciate your input!