This is a chic Chirimen (crepe) Nagoya obi
with 'Shakunage'(rhododendron)-like flower design, which is dyed.
Textile is chirimen (crepe) silk and has soft and textured touch.
The actual background color is relatively more bluish than the photos.
It has prominent discoloration from the tare end to upper otaiko(square bow) and noticeable.
Although not shown on the photo and figure, it has patinas on otaiko(square bow) and a little bothering.
For the details, please refer to the photos and the sheet.
Unfortunately, it is no longer wearable due to the prominent discoloration.
The wonderful textile could be useful for your handicraft or dressing practice.