Rumi Tek Altin - Mahmud II Kostantiniyye mint

The Rumi Tek Altın belongs to a reformist monetary moment under Mahmud II, who spent much of his reign systematically dismantling institutions that had calcified the empire for a century. The coinage issued from his Kostantiniyye mint during this window reflects a treasury under sustained pressure — protracted conflict with Russia and the grinding cost of suppressing provincial rebellions, particularly in Serbia and the Aegean, forced repeated debasements across Ottoman gold issues of this period.

The .800 fineness here is notably below earlier Ottoman gold standards, a quiet but deliberate adjustment that predates Mahmud's more overt monetary reforms of the 1830s.