Thanks,
That's one more NSN for the Survey.
Just need to work out now, where 6625-99-620-9572 fits in with the Sets?
I guess the Military side of Avo Meters is still a Work in Progress.
Another useful purpose of this Survey Thread.
Incidentally, just to make things even more complicated, there is another
NSN inside the Case Lid,
This might be the NATO Stock number for the associated User Manual.
Can't be sure, because the NATO records are not very informative, but I
came across a description "Case, Carry, Instr" for one of the Numbers.
Ian