These two dapper gents in their 30s are posing in front of a cloudy and hilly backdrop all smile! The people with them must have said something really funny for them to look this entertained! This tintype seems late period, maybe around 1910. Their popularity dropped in the first decade of the 1900s, but they were still fairly common with travelling photographers until the 20s.
The glare is from a small bend in the middle reflecting the scanner light. Unfortunately many tintypes have such bends through decades of handling.