I've previously heard WO2's within the Dvr trade refer to other WO2's within the trade but with a different role as WO3's! i found this quote below on the Tinternet and wondered if they had got it all arse about face! (i draw your attention to the badges worn by a WOIII and that of a WOII) From 1938, there was also a rank of Warrant Officer Class III (WOIII). The only appointments held by this rank were Platoon Sergeant Major, Troop Sergeant Major and Section Sergeant Major. The WOIII wore a crown on his lower sleeve (which is why all WOIIs switched to a crown in a wreath during this period). The rank was placed in suspension in 1940 and no new appointments were made, but it was never officially abolished.