Codes used in several countries
RM on a licence plate
RM is an area code in 4 countries. The plate's style and country code tell them apart.
Germany
RM-AB 1234Code details →Mecklenburgische Seenplatte (Mecklenburg-Western Pomerania)
named after Röbel/Müritz
Italy
RM A58322Code details →Rome (Lazio)
Spain
RM-1234-ABCode details →Río Muni (now Equatorial Guinea)
No longer issued
United Kingdom
RM51 ABCCode details →Reading
Germany
Italy
Spain
United Kingdom