As I am (only) 36 years old, I can't prove it's unissued, but this helmet doesn't show any wear at all, beside from storage. It's made with the larger shell (I took a 6 3/4 to show)and size 7 1/2 makes this helmet perfectly usable.
Please mail me if you're interested. I am looking for DR Boots in size 12, that could be a trade option.
Regards, Sven
Sold to a happy BSA owner from Sweden...
The other one, which is in very good original condition, size 6 3/4, is also for sale @ €100 ono
more pictures available