OS·Poland

Issued in Ostrołęka (1975–1998)

This meaning is from an older system (1976–2000). Plates issued today use other codes, but older cars still carry it.

Ostrołęka (1975–1998)

Voivodeship · Seat: Ostrołęka

Abolished in 1998. The map shows today's units, so it is not drawn there.