[grumpy]

The Royal Arms in Wreath (1918 onwards) At the end of World War One it was decided to adapt the Royal Arms in the same way the Crown was in 1915 by adding a Wreath, as it was felt by some that the Crown in Wreath lacked a little in 'style' over the Royal Arms now in use by the 'Group 2' Warrant Officer Class One.

So at the close of World War One, Three badges were in use by Warrant Officers. The Royal Arms within a Wreath by 'Group 1' Warrant Officer Class 1. The Royal Arms by 'Group 2' Warrant Officer Class 1 and the Large Crown by Warrant Officers Class II. The Crown in Wreath no longer being in use.[/QUOTE]
In the interests of historical accuracy I think you will find that AO 309 of October 1918 specified the crown and wreath for many WO II appointments: Master Gunner 3rd class [with gun], Artificer QM Sergeants [with crossed hammer and pincers], a goodly number of other QM Sgt appointments with appropriate horseshoe, crossed rifles etc] and all QMS of line infantry.

Incidentally, there were indeed two rank badges when the Sgt Major wore the crown: the WO Bandmaster badge incorporated the crown into a one-piece wreath lyre and crown.