Swedish label of Sveriges Radio AB, a record company owned by Sveriges Radio (Swedish National Radio). Successor to label Sveriges Radio, although both seem to be used around 1970.
The olive disc label started to be used around 1968-69, and was superseded by the blue and yellow Neumann microphone disc label in the 1970's.
In their 1972 catalog there's a price guide related to the prefix [expressed in SEK, 100% is 31.75]
RELP low price LP [62%]
RMLP medium price LP [81%]
RHLP "artist" LP [100%]
RULP, RAEP and RFEP about half the budget price [37%]
** Also, see label: SR (7)