Are these real?

[Sld58]

I received these from my grandfather to get restrung. I did the tooth test and rubbed two together and it was smooth for both. I am not holding out much hope, but are these real?

 

[Caitlin]

I doubt it. They are very discolored. I wonder if they can be cleaned?

 

[pattye]

A close up photo would help us be more certain, thank you.