Yes, commercial cloth, probably woven on a Rapier loom hence the lack of selvedge. If intended for kilting then this type of cloth is finished with a tucked (glued) edge - it's not a selvedge. It looks like a homemade kilt from a length of remnant material.

The sett is the simplified Gov't tartan which is generally sold as Black Watch of Sutherland but Pendleton Woolen Mills sold this as Wartley but it is not known why.