Wenger makes variations and the combinations to a knife, you will find nail file vs small blade and corkscrew vs phillips in most cases, this give
sometimes unknown models without a name. Locking blade and non locking also.
From my research it is possible to find extra special knives like a gift knife to a person, these are extra collectable.
The embossed characters and icons is made of a silver marking tape, used models may have damages to the icons or the tape has worn off. When cleaning them it can be smart not to use a toothbrush to much. Usually on my knives all of
the characters are intact even on used knives.