Armament Staff Sergeant Insignia

[Drew]

Hello everyone,

I have a query about the ranks of 'Staff Serjeant' and 'Armament Staff Serjeant' in the First World War. Was there any difference in the rank badges worn or are they identical? Would the Armament Staff Serjeant have worn any other badges in addition to the crown and chevrons?

Many thanks in advance for any help you may be able to provide.

Chris