Codes used in several countries
OPR on a licence plate
OPR is an area code in 2 countries. The plate's style and country code tell them apart.
Germany
OPR-AB 1234Code details →Ostprignitz-Ruppin (Brandenburg)
named after Ostprignitz, Ruppin
Poland
OPR 12345Code details →powiat prudnicki (Opole)
Germany
Poland