Info on Polish Made Levels (VIS)

[eeler1]

Do the Polish levels have an adjustment mechanism? Can it be calibrated, and if so, how?

 

[ddickey]

I would think all of them would.

 

[darkzero]

Do the Polish levels have an adjustment mechanism? Can it be calibrated, and if so, how?

It does, even my China one was adjustable. The adjustment collar on my China one was the worst thing about it.

 

[Choiliefan]

Somewhere around here I have a Fell precision level which has a big round bubble in the center of a cast iron block.
Mines not as nice as this one shown on wikipedia: https://en.wikipedia.org/wiki/Spirit_level#/media/File:5Sec3Tenths.JPG