These were in with a dozen old Pearson arrows I picked up. Only marking is a single H in between each blade. Thanks for any help.
Ray
(http://i796.photobucket.com/albums/yy249/RJR9603/DSC08452_zpsac966e2b.jpg) (http://s796.photobucket.com/user/RJR9603/media/DSC08452_zpsac966e2b.jpg.html)
(http://i796.photobucket.com/albums/yy249/RJR9603/DSC08453_zps5c624e00.jpg) (http://s796.photobucket.com/user/RJR9603/media/DSC08453_zps5c624e00.jpg.html)
It looks like the 1961 Hi-Precicsion manufactured in Orange City, Iowa.