Unmarked. From my Google search I think it was made in the 1800's. Measures a little less than 6 and 1/4 inches tall. The base is 1 and 3/4 in. It unscrews into three separate parts. The internal piece that I think had a mirror in it does rotate nicely. The glass has no damage that I can see. I don't know the magnification, but it does work. Pictures are part of the description please ask questions before bidding.

Edit to add that info this brass piece with a magnifying glass in the bottom of the box that this was in. I don't know if it goes with it but I'm including it.