This is a summer fukuro obi.
Both the right side and the reverse side has marine-colored wavy lines throughout.
About half past, the wavy lines through the middle become straight.
Textile is silk, and it's soft and crisp.
It's unfinished with both the ends left open.

As the photos and the sheet show, discoloration is rather noticeable on the folds.
As shown in the last photo, patina like brownish dots are spread allover.
It has somewhat strong old smell.
For the details, please refer to the photos and the sheet.
It's not in wearable condition, however, the wonderful textile could be useful for your handicraft.

*Approx background color - HTML code (484a95)

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Softness ( Exceptionally Soft, □ Soft, Medium, Comparatively Stiff, Stiff )
description:ohashi
photo:sakon