GERMANY. Democratic Republic. 20 Mark (1977). Commemorating the 200th anniversary of Gauss's birth.
Obv: DEUTSCHE DEMOKRATISCHE REPUBLIK.
Coat-of-arms.
Rev: CARL FRIEDRICH GAUSS.
Gauss equation.
KM 66; Jaeger 1563.
Condition: Mint state.
Weight: 20.91 g.
Diameter: 33 mm.