Verein für Raumschiffahrt
The Verein für Raumschiffahrt ("VfR", English: Society for Space Travel) was a German amateur rocket association prior to World War II that included members outside Germany. The first successful VfR test firing with liquid fuel (five minutes) was conducted by Max Valier at the Heylandt Works on 25 January 1930; and additional rocket experiments were conducted at a farm near Bernstadt, Saxony.
Source: Wikipedia — Verein für Raumschiffahrt (CC BY-SA 4.0)