cool jch! all i could tell you is that is austrian built (probably by steyr) and i have one too.
coinincidently, that is my other 63' jch in the background of the 2nd pict.
this is def a beater bike with a sachs-dreigang torpedo 3speed hub/coaster combo. i love thoses 3speed with coasterbrake hubs cuz it kills two birds with one stone, brakes and gears. seem to be nice bikes, but i am not a fan of the cottered crank.