Series Is Presented Here As 3 Variables: (1) Annual Data, 1880-1919; (2) Annual Data, Paper Marks, 1917-23; (3) Annual Data, Gold Marks, 1923-35. Source: Deutsche Reichsbahn Gesellschaft This NBER data series a02087cc appears on the NBER website in Chapter 2 at http://www.nber.org/databases/macrohistory/contents/chapter02.html. NBER Indicator: a02087cc