Commemorative Cross of the 1916–1918 War exterior and 7 mm on the interior. In the center of the cross, there is a 13 mm circle. The external borders of the cross and the circle have 1.3 mm. Inside the circle, on the obverse, there is the royal cypher of King Ferdinand I of Romania (two "F"s facing away with a royal crown on top), while on the reverse there is inscribed "1916"|"1918" on the early models and "1916"|"1919" on later models, in two rows. The 30 mm ribbon alternates four equal bars of dark blue with three equal bars of green. Seventeen clasps were approved for
Decoration for Officers of the Royal Naval Reserve dark green until 1941 and green edged white thereafter. Originally, fifteen years' service was required (not counting service as a midshipman), with wartime service counting double. Clasps to the Reserve Decoration were awarded to recognise further periods of 10 years' service after the first award. When just the ribbon of the Decoration was worn, each clasp was indicated by a silver 'rosette' on the ribbon. The RD and the Royal Naval Reserve Long Service and Good Conduct Medal for RNR ratings were both replaced by a combined-services Volunteer Reserves Service Medal on 1 April 1999. Decoration for Officers of the