Siemens Sh 20 60 horse power aircraft engine, 1932. Creator: Unknown.
2-701-933 - The Print Collector/Heritage Images
Siemens Sh 20 60 horse power aircraft engine, 1932. The Siemens-Halske Sh 20 air-cooled engine was manufactured by Siemens & Halske in Germany in the 1930s.