300 Rupees - Birendra Bir Bikram Constitution

The 1990 date is the critical detail here. Nepal's political upheaval that year — the Jana Andolan movement — forced King Birendra to abandon the Panchayat system and accept a constitutional monarchy, ending three decades of party-less authoritarian rule. This coin commemorates that new constitution, making it the rare case of a monarch issuing a coin that explicitly marks the curtailment of his own absolute power. The timing of the strike, almost certainly authorized before the full extent of democratic reforms was clear, gives the issue an unintentional irony.