I don't think it's for a bayo-pick helve or entrenching tool handle carrier perhaps?
PS-Or mine probe handle?
I don't think its for an entrenching tool handle because the hole at the base of the frog would be to small, my index finger just fits in the hole.
Or mine probe handle -nothing to keep a bayo scabbard in place after the bayo itself is taken out.
Not sure I have never seen a mine probe handle, I will have wait and see if anyone can ID the frog.
Looks like a later version of the wirecutters pouch.
Think you could be right Ade, I found one on the net and the only difference was a flap with press stud.
This is a FROG, CUTTER, WIRE, MARK VI coded A1/AA 5608, but re-coded CN 0978 in 1951 & re-named NO. 6 in place of Mark VI.
Thanks for the confirmation.