The photograph was produced in-studio by SPEAKER's, of Paterson, NJ.  

The insignia on the kepi probably refer to either the 7th New York or 7th New Jersey regiments. This was not a camp-produced CDV or tintype but a formal studio portrait.

This Cabinet Card has a fancy scalloped edge, measures about 6-1/2" by 4-1/8", and shows the soldier in the typically ill-fitting uniform jacket of the time.  In this case, it appears slightly too tight/small.  

'JAMES JAMIESON' is written on the reverse in pencil.  I'm guessing James was the young soldier depicted here.