I recently consolidated all the information known about Eye Brand knives and published a report with help from a couple of experts. Hopefully folks will enjoy this. Please let me know what you think and let me know if you have updates. See the website below
German Eye Collectible Folding Knives for sale
Carl Schlieper Eye Brand 20SS-DS Trapper - KLC09434 - The Cutting Edge
Carl Schlieper “German Eye” multitool pocket knife
Eye Brand Knives: we carry the full Eye Brand knife line
The Collector's Guide to Switchblade Knives: An Illustrated
vintage german eye knife products for sale
Carl Schlieper 56-DS German Eye Pocket Knife
Eye Brand Post Oak Knife Co.
German Eye Brand Carl Schlieper Sodbuster Lockback Folding Knife
German Eye Brand Trapper 4 Closed, Red Bone Handles - KnifeCenter