I am no expert by any means but just from looking at your pictures I would say those cards are awful white for being over 100 yrs. old. Paper will show fading or yellowing long before 100 years. I would try and get them authenticated before you made any attempt to sell them.
Topps Chrome Red Refractors /25 and Topps Chrome Gold Refractors /50.
Bowman Chrome Orange Refractors /25 and Bowman Chrome Gold Refractors /50
Bring them to me-Football only