1922 AD., Germany, Weimar Republic, Reichsbank, Berlin, 3rd issue, 50000 Mark, Pick 79(1). A·35523644 Obverse

State: Germany, Weimar Republic
Issuer: Reichsbank
Location of issue: Berlin
Date of issue: 19. Nov. 1922 AD., Third Issue 1922,
Value: 50000 Mark
Size: 190 x 110 mm
Material: paper
Watermark: oak leaves
Serial : A (all observed: A, B, G, H )
Serial no. : 35523644 (Serial number 8 digit brown)
Signatures: (12)
Printer: Reichsdruckerei, Berlin (Germany)
Obv.: Reichsbanknote / Fünfzigtausend / Mark / zahlt die Reichsbankhauptkasse …. / A·35523644 , portrait of Cologne merchant and mayor Arnold von Brauweiler (painting by Bartholomäus Bruyn), with a center underprint at texted value (eagle).
Rev.: 50000 – 50000 / Reichsbanknote / 50000 / Fünfzigtausend Mark / WER BANKNOTEN NACHMACHT …. , value and text in oval and square ornaments.
References: World Paper Money, Pick 79(1) ; Rosenberg R-79a .
For a very similar note without underprint see Pick 80

Arnold von Brauweiler (* 1468 in Köln; † 1552 ebenda) war ein Kaufmann, Ratsherr und Bürgermeister im Köln der frühen Neuzeit. More on https://de.wikipedia.org/wiki/Arnold_von_Brauweiler

Bartholomäus Bruyn (1493–1555), usually called Barthel Bruyn or Barthel Bruyn the Elder, was a German Renaissance painter active in Cologne. He painted altarpieces and portraits, and was Cologne's foremost portrait painter of his day. More on https://en.wikipedia.org/wiki/Barthel_Bruyn_the_Elder