Re the original post and picture- the 3 sea-axes are the wrong way around-
should be handles port, blades stbd, notches down. Also everything I've ever seen says CXI. Ref,
RAF - 111 Squadron My wall plaque is that way, as is the picture in the book 'Adstantes' but most authoritatively, on my old coffee mug!
Postscript- Rolandpull's link also has seaxes the wrong way around- but "we are French-types" (Holy Grail)