see here-Binoculars and scopes - U.S. Militaria Forum
US MODEL M49 observer scope
Thx. a lot, Bud !
Very interesting !
This spotter scope was the property, (as I was told), of the German Mountain Trooper Karl Endgassner.
Endgassner, (a native of Styria), was "drafted" as a sniper in Yugoslavia, after shooting down tree partisans of a treetop, bottom up !
Karl Endgassner was living after the war in Grödig, (near Salzburg), and used this scope, (as a huntsman), for hunting deer.