One of the Spyr 3s flown by Bauer at the International Competitions in 1937. The contest number 9 on a red and white striped diamond, and the words Zwieback Singer, appeared on the fuselage. Other sailplanes visible are, on the left, the Czechoslovakian Tulak 37 (registered OK-CECHY) and on the right, one of the Polish PWS 101s (SP-1005) with a Condor beyond it.