Poland
BT·Poland
Issued in Białystok (1975–1998)
This meaning is from an older system (1976–2000). Plates issued today use other codes, but older cars still carry it.
Białystok (1975–1998)
Voivodeship · Seat: Białystok
Abolished in 1998. The map shows today's units, so it is not drawn there.