Engineering Tools Maybe ?

[mcgranag]

Hi Dizjasta,
Unfortunately not, was amongst items in one of my fathers tool chests, and unlikely that the gauge has been missed. One of those thing, but at least I know what it is for, mystery solved, thanks.
May leave it on a shelf and let people try and work it out, although it’s specialist knowledge I think, is this your line ?

You might try a Civil Engineering, or Building Construction Department in a university or college. They might be able to utilise the two spare bars if they have the matching gauge apparatus. Unfortunately its not much use as the kit is separated! Best regards, Gerard