OLD RARE 1950's, 6070's HUGO KOLLER SINGLE BLADE LOCKBACK KNIFE AWESOME STAG.TIGHT!!!!!!
WW1 German Fighting knife by Hugo Koller - JDR Militaria
Stag Leverlock | Arizona Custom Knives
Images for 423587. HUNTING KNIFE, double-edged, Hugo Koller, Solingen, Germany. - Auctionet
Hugo Koller 7.5" Carving Knife Carbon Steel Ebony from Solingen German – Bernal Cutlery
Sold at Auction: FOUR GERMAN WORLD WAR ONE AND TWO BOOT or TRENCH-KNIVES, ONE SIGNED 'HUGO KOLLER, SOLINGEN',
WW2 German, Soviet, Allied militaria, uniforms, awards, weapons history. War relics forum
WW1 Imperial German Trench Knife with 142mm long double edged blade maker marked Hugo Koller, Solingen. Overall length 265mm. Wooden grip with five possible "kill" notches carved into it. Complete with scabbard