A true early-mid 1970s mountaineering boot. This Kastinger has a couple unique construction attributes. The hinged heel allows for the boot to flex without stressing putting undue stress on the boot or the wearer. Second feature that makes this boot both special and revolutionary is the stitchless injection-molded welt, which is quite a departure from the Norwegian and Goodyear welts most boots of this era used.
The gaiters seen here are a similar era (maybe a little later) The North Face nylon blend model.