D.R.G.M. Pantograph Knife

This image features an antique D.R.G.M. pantograph knife, a unique type of folding pocket knife known for its mechanical opening system. The 'D.R.G.M.' stamp stands for Deutsches Reichs-Gebrauchsmuster, a design protection registration used in Germany from 1891 until roughly 1945, indicating that the specific mechanism or design was registered for protection under German law. These knives were primarily manufactured in Solingen, Germany, a city renowned for its high-quality cutlery and blade production. The pantograph design allows the blade to extend and retract via a linked metal frame, often housed in handles made of brass, wood, or bone.

The brand or manufacturer of such knives varied, as D.R.G.M. is a patent mark rather than a company name. However, many were produced by prominent Solingen firms like Hugo Köller. In modern terms, since the D.R.G.M. system is obsolete, these items are now considered collector's pieces or antiques. There is no single 'ultimate owner' in the corporate sense for the D.R.G.M. mark, as it was a state-administered registration, and the original manufacturers have often long since dissolved or evolved into different entities.