I just noticed the label says "Ben Pearson/Consumer Division Brunswick Corporation" and gives a Pine Bluff Address.
According to the Archery Archives site
Archery Archives , Ben Pearson was sold to Brunswick in 1972 and the address was changed to Tulsa Oklahoma (another source lists October 1972 as the sale date).
Now, here is my theory. To me this means that they were made after the sale but before the address was changed officially. They must have been manufactured somewhere around the end of 1972, as in 1973 the address had been changed to the Tulsa location.
As for the Razorheads. In 1971 Ben Pearson died. In 1974 the company's new owners came out with a new broadhead called the "Switchblade", so my theory is that the reason this set of hunting arrows had Razorheads is that the Pearson Deadhead wasn't being made anymore, and they hadn't come out with the Swithblade head. Total conjecture on my part though, as I can't find an end date to Deadhead manufacture. Either that or Brunswick decided to sell Razorheads because the demand was there.
It would be nice if I had some more old ads or pictures to refer to, but there isn't as much stuff out there on Ben Pearson.
I love this detective work!
RonP
RonP