Coats rim clamp tire machine ID?

[Ggg]

I got this to replace my old Coats 20/20. I've searched the Coats site but can't identify the model. Anybody have any ideas?

 

[Ggg]

Back side

 

[gungatim]

lgr

 

[Ggg]

Thanks, I had thought is was an RC series. I assume the 50 series preceded the RC.