Unknown Young Men

This photo was found in my GGGrandmother's photo album. This is a tin-type.

Does anyone recognize either of these young men? The one on the left appears to be about 13 to 14 years of age wearing a shirt, buttoned vest and slacks. The other is wearing a shirt, jacket, and slacks with his right hand holding his jacket. The attire would place the picture in the late 1800s.