Browning Pistol Set ?

I have the opportunity to acquire this set, however, I am uncertain of its provenance. The set is in the black vinyl case. All are 1968 manufacture, however, the HiPower has the tangent sight and the 1910/55 is 7.65 (.32ACP). Can anyone confirm that this variation was distributed?

Art

"An armed society is a polite society. Manners are good when one may have to back up his acts with his life." Robert A. Heinlein