The Royal Air Force Long Service and Good Conduct Medal was instituted by King George V in 1919, the year following the establishment of the world's first independent Air Force. The medal could be awarded to Regular Force non-commissioned officers and airmen of the Royal Air Force. The award criteria was later relaxed to also allow the award of the medal to officers who had served a minimum period in the ranks before being commissioned.
The medal was struck in Silver and is a disk. The obverse of the medal shows the effigy of the reigning monarch, King Geroge V, on the first version. Two versions of the medal each were produced during the reigns of King George VI and Queen Elizabeth II.
The reverse of the medal remained unchanged through all versions of the obverse and bears the Royal Air Force eagle with outstretched wings, surrounded by the crown and with the insciption "FOR LONG SERIVCE AND GOOD CONDUCT" around the circumference.
The Clasp bears the image of an eagle with outstretched wings, surmounted by the crown.