An original patent from the archives of Marklin engineer Hans Thorey. Today many of these patents are locked up in the research archives of the Marklin factory in Goppingen. This is an ORIGINAL patent submitted by engineer Otto Bang-Kaup. The patent is in overall good condition, all pages, present. For the Marklin collector interested in the history of Marklin! An absolute one-of-a-kind rarity.
Provenance: purchased in Germany from the estate of model railroad engineer Hans Thorey who worked for Marklin for a number of years.