and the 'Clinometer, drum' all by itself
and the markings
The drum clino has no military markings but as it came from a defense establishment and because of the finish and date is believed to have been in Army or Navy workshops.
The other is a 'Clinometer, Field,Mk VI [made by?] N & F S 1943'
It is one of 25 that I bought from a Disposal Store for $5 each and whisked around to small engineering firms who snapped them up. Not one knock back. I'm not saying for how much but I was very happy


I'll do some better photos of the Field clino when I finish my camera stand.