Just to add another layer of confusion onto this. Because these were generally commercial photos sold in Sporting publications by various outfits over a large period of time...
....even if you think it's somehow a Type I, there's a very good chance it's a Type II...and if you think it's a Type III, there's an even better chance it's a Type IV.
I'd explain further, but I don't think I have the energy.
Just enjoy your collection while you can, for whatever it may or may not be.
