San Francisco State Game Used Riddell TK suspension helmet from the mid 1960s.  The helmet shows serious exterior game wear while the interior retains its original suspension and rubber crown doughnut.  The helmet has the original Schutt 60s style NOP model facemask.  The mask is secured to the helmet using replacement reproduction clips as the original clips were brittle and broken - which is the case with every helmet from this era.  The helmet has early Riddell heat stamps on the rear of both sides flanking the center ridge of the helmet.  A very rare helmet of a highly desireable model, that obviously saw a lot of action on the gridiron.