Small Pocket Knife, Vintage Folding Pocket Knife, Solingen Germany

Need Help on SOLINGEN Germany Pocket Knife

Vintage Antique Germany Solingen INOX Brass 2-Blade Folding Pen

VINTAGE KRUSIUS SOLINGEN GERMANY SMOOTH BONE FOLDING POCKET KNIFE

6) Vintage Folding Pocket Knives;

Antique Pocket Knife/Vintage bayer brass and enamel pocket Knife

Boker Traditional Gentlemen's Folding Pocket Knife

Small Solingen Pocket Knife

Vintage Small Moose Pattern with Brown Pick Bone Handles

Vintage Small Moose Pattern with Brown Pick Bone Handles

Help me date these vintage German Solingen knives!