"CWLee" wrote in message
m...

I inherited (from a building contractor buddy) a small tool/device. I
can't post a photo here, but the visually imaginative readers can picture
what I mean from the following description.

It is cylindrically shaped, about 1.5" diameter, 6" long, in a metal case.
Lens at each end. Acts as a low-power telescope. The top of the device
has a bubble level, with optics such that when standing on one side of a
room, and looking across it, one can not only see the other side of the
room but also the bubble level and a horizontal marker. One can raise and
lower the angle of the device so as to get the bubble in the center of the
markings, and that allows the user to see, on the far wall, what is
exactly at eye level.

I don't know what building or other application would call for such
information, but that appears to me to be what the device is designed for.

My question is: What is this called in the trade? In what trade would
that be? Surveying? Plumbing?

Corrections to my understanding, and other comments welcome.

It might be a Dumpy level or some variation of one.

Charlie