300 Dinara Energopetrol voucher

Energopetrol was a Sarajevo-based petroleum distributor operating under Yugoslavia's socialist self-management system, and fuel vouchers of this type were a practical workaround for the chronic supply irregularities that plagued the Yugoslav economy through the 1980s. They functioned as prepaid scrip redeemable at company pumps rather than currency proper, sitting in a grey zone between internal accounting instrument and quasi-monetary token.

The 300 Dinar denomination places this almost certainly in the late 1980s, when hyperinflation was accelerating and face values on everyday transactions were climbing rapidly. A voucher denominated in hundreds of dinars would have purchased a modest quantity of fuel one year and almost nothing the next.