Can you ID these vintage '70's broadheads?

[Zano]

A friend asked me if I knew what these were.  He said he got them from a guy who said they were vintage 70's.  At first I thought they were old Snuffers, but some research indicates they are old "H" broadheads, which I've not heard of.  

Any one have a clue as to what these are, and if they are "H" broadheads, who made them and when?

Many thanks!

[Ted Fry]

Hi- Precision  Made in Orange city Iowa, late 50s early 60s

[wadde]

1961 High Precision