1975 AD., Hungary, Magyar Nemzeti Bank, Budapest, 500 Forint, Pick 172b. E229-183083 Obverse

State: Hungary
Issuer: Hungarian National Bank (Magyar Nemzeti Bank)
Location of issue: Budapest
Date of issue: 28.10.1975 AD.,
Value: 500 Forint
Size: 174 x 80 mm
Material: paper
Watermark:
Serial : E229
Serial no. : 183083
Signatures: Signed by: Pulai Miklós, Timer(?), Fekete János (3)
Printer: Magyar Pénzjegynyomda Állami Vállalat, Budapest (Hungary)
Obv.: 500 – 500 / ÖTSZAZ FORINT / BUDAPEST, 1975. …. , portrait of Endre Ady. Graffiti “20“ at upper right edge.
Rev.: 500 - ÖTSZAZ / E229 / 500 / 183083 / …. , Budapest and Danube river aerial view.
References: World Paper Money P-172b .

Endre Ady (Hungarian: diósadi Ady András Endre, 22 November 1877 – 27 January 1919) was a turn-of-the-century Hungarian poet and journalist. Regarded by many as the greatest Hungarian poet of the 20th century, he was noted for his steadfast belief in social progress and development and for his poetry's exploration of fundamental questions of the modern European experience: love, temporality, faith, individuality, and patriotism.
More on https://en.wikipedia.org/wiki/Endre_Ady