This is a Tsumugi Nagoya obi
pattern, which is made by patchwork('kiribame').
The tasteful design will set your kimono off.
Textile is rustic soft Tsumugi
silk with knobs of yarns.
The relatively large stain on top of the 'otaiko'(square bow) will be hidden when you tie it.
The weaving flaw is actually knobs of yarns, not a flaw.
There are some other flaws.
For the details, please refer to the photos and sheet.
It is still in good condition.
Enjoy wearing the tasteful design.