O descoperire... / A discovery...

... la introducerea lor in 1956, numerele ovale de ambasada aveau si anul pe ele. Nu stiu cat timp a durat acest sistem; era inca in existent in 1959 (poza 3); cert e ca in poze de la mijlocul anilor 60 (precum poza 4), anul nu mai apare.

...at their introduction in 1956, Romanian diplomatic plates had the year on them too. I'm not sure how long this system lasted for; it certainly existed in 1939 (photo 3); and in photos from the mid 60s (photo 4), the year is no longer shown.