Tom, wouldn't a flag produce at an Army depot have followed the regulations? The 164th OH flag is about 18-inches too long at the fly. From the Revised US Army Regulations of 1861:

"COLORS OF INFANTRY REGIMENTS.

1466. Each regiment of Infantry shall have two silken colors. The first, or the national color, of stars and stripes, as described for the garrison flag ; the number and name of the regiment to be embroidered with silver on the centre stripe. The second, or regimental color, to be blue, with the arms of the United States embroidered in silk on the centre. The name of the regiment in a scroll, underneath the eagle. The size of each color to be six feet six inches fly, and six feet deep on the pike. The length of the pike, including the spear and ferrule, to be nine feet ten inches. The fringe yellow ; cords and tassels, blue and white silk inter mixed."

Ed