An oval medallion measuring 38mm in height by 32mm wide in silver coloured
cupronickel.Obverse: The crowned head of Queen Elizabeth II and the legend
ELIZABETH II DEI GRATIA REGINA FID. DEF.Reverse: The original 1961 medal depicted three shields, each bearing the initials of one of the three main services:
CD,
AFS and
NHSR, with an oak branch in the background. A separate Northern Ireland version had the initials
AFRS (Auxiliary Fire and Rescue Service) and
HSR (Hospital Service Reserve) on the last two shields. When the award was extended to Gibraltar, Hong Kong and Malta in 1963, a new reverse was designed, bearing the words
CIVIL DEFENCE and
LONG SERVICE, separated by a design of laurel wreaths and palms. This was the only design in use after 1968. The medal hangs from a straight bar, with a 32mm wide ribbon of dark blue with three narrow stripes of yellow red and green. The yellow is worn furthest from the left shoulder. Miniature medals for wear at black tie events remain available from several commercial sources. ==Naming==