50 Piastres

The 1983 Bank of Sudan note series marked the introduction of Islamic banking principles into Sudan's monetary framework following Nimeiry's September Laws, which imposed sharia across financial institutions that same year. The timing was not coincidental — this issue was part of a broader institutional restructuring that renamed and reorganized the central bank's operating mandate.

Watermark-only security on a state issue of this period reflects limited access to sophisticated printing contracts, though the specific printer for this series has not been definitively established in the major references.