buckstix, I have a copy of one of A Squares early catalogues. It is a very informative 16 page booklet containing all the info on their rifles, ammo, ballistics of their ammo and a cartridge guide with info on the 7mm Rem Mag up to the 500 A Square. Plenty of interesting bits and photos including a couple of P H Capstick one with his new A Square ,470 Capstick Hannibal rifle and another of him and A Square founder Art Alpin posing with a couple of Buffalo they shot when hunting together.
I could scan to a file and send you if you would like to PM me.