This massive (probably the heaviest binding ever made) is as far as I can tell an Italian “craft manufacturing” copy of the Iser. Or, perhaps Iser copied them? Their vintage is mid 1970s, and they may have been the binding of the “Alpini” mountain troops of the Italian army. Click images to enlarge.
Weight: 1096 grams, 38.7 ounces per binding.
Thanks goes to Raymond Cronrath for donating these backcountry skiing bindings to the WildSnow collection.