1982 Fleer Stamps Baseball Forum

I just received an Ozzie Smith stamp in a trade and noticed 2 marks on the back that look like they may be glue marks or spots were the glue on the back got wet. When I checked the Ozzie cards on COMC site, they all have the same marks! Not only that, all the George Brett ones and Dave Winfield ones have the same marks too! Does anyone know why these marks are on those stamps, would stamps even exist of those players without the marks on the back?

I'll have to look. Mine are all still in original packaging, think I opened 1 of each set though and left the rest sealed.