This is a sophisticated Nagoya obi
with wave and mist pattern, which are woven in a sedate tone of colors.
Textile is exquisite silk and has soft touch. (Very soft lining is added inside.)
It has rather prominent folding lines.
It has some large silver stains like parts on the otaiko and tare end - we don't know why the silver coated threads are used there, and silver dyestuff are peeled at places there. ( the first and the second flaw photo).
Please check photos and a figure for details.
It must be wonderful daily wear!