This is a beautiful condition Carl Schlieper Eye Brand Whittler knife with bone handles and its original yellow box. Some of the photos show the scales in a light brown, but they are dark brown.
From the early 1970s to about 1981, the diagnostic tang stamp became the well-known “Eye” above “Germany”, the “Eye” stamp. Beginning in 1979, the pile side included the pattern number. When the Eye stamp occurs with the Banner etch, these knives have become known in collecting circles as the legendary “Three Eye” knives. It should be noted that the shield is not part of the Three Eye configuration. Likewise, although the Arched tang stamp contains an eye and occurs with the Banner etch but is not a legitimate Three Eye. Only a Banner etch, and the Eye over Germany tang stamp is diagnostic of a Three Eye knife.
This knife has the Arched Tang Stamp on the Primary Blade, and the Eye over Germany tang stamp on the other two blades. The Blade is also etched with an eye beside three lines. Line 1 "CARL SCHLIEPER", Line 2 "HAMMERED FORGED, and Line 3 "Solingen GERMANY".
The below referenced information is accredited to Mark Cole, and his 2021 book "The Eye Brand Guide"
Figure 1 – Left to Right - Straight Line Tang Stamp, Variant of the Straight Line Tang Stamp
Figure 2 - Left to Right - Eye Visible on the Pile Side of the Oldest Knives, Arched Tang Stamp, Eye over Germany
Figure 3 - Eye over Solingen, early 1970's Handle Shield
Figure 4 - Eye Brand Shield and Eye ID Chart
Based on the above chart, this knife most likely is from the early 1970's.
Length closed is 3 3/8 inches. The primary blade is just over 2 1/2 inches in length. Both of the other blades are 1 1/8 inch in length.
The dark brown scales are secure without cracks, and the primary blade snaps nicely when being closed. The two smaller blades snap closed in a weaker manner.
Please check out the photos to determine condition and value for yourself.