This is a Tsumugi Nagoya obi
with flowers & birds pattern, which is embroidered.
The pattern has Sagara embroidery technique and fine drawn works (one of the techniques of removing thread partly to make a ground textile seen through) on the pattern.
Textile is rustic soft Tsumugi
silk with knobs of yarns.
Although it doesn't bother to wear it, there are slight discoloration, patinas and folding lines.
For the details, please refer to the photos and figure.
Although it has such flaws, it is still in wearable condition.