The "DRP" stamp on a vintage German .22 rifle stands for Deutsches Reichspatent (German Imperial Patent), meaning the internal mechanism design was patented. These firearms are typically Deutsche Werke Model 1 single-shot "garden guns" or youth rifles manufactured in Erfurt, Germany, between 1919 and 1939. 

Vg condition , no cracks in stock or chips, it shoots good. Fun collectible rifle