Bill Sohne
··Bill @ ΩFOmega Thin Arrow Military watch 6b/542 57 issue and RNZAF 56 issue. Have never come across a 57 issue or even seen a picture of one. So in my eyes it's extremely rare.
Cheers Russell.
lets call it uncommon...
rare is reserved for stuff like a grade very best or a 372 in my book...
best
bill