Yirmilik - Abdülmecid I Kostantiniyye mint

The yirmilik — twenty paras — was issued in the opening years of Abdülmecid I's reign, a period defined by the Tanzimat reforms of 1839, which restructured Ottoman administration, taxation, and currency policy simultaneously. The billon coinage of this era reflects chronic treasury exhaustion following the Greek War of Independence and successive conflicts with Egypt under Muhammad Ali, whose forces had reached Anatolia as recently as 1833.

The Kostantiniyye mint was under considerable pressure during these years to produce subsidiary coinage in volume while the empire negotiated new fiscal arrangements with European creditors. The low silver fineness — barely seventeen percent — was not a departure from standard but the prevailing reality of Ottoman billon by this point in the reign.