This is a Fukuro obi
with elegant circles of 'karabana' (imaginary flower in china) and facing birds, which is woven.
'Raden'(design in mother-of-pearl inlay) foils are used on Tare end and Otaiko pattern, and they shine by angle of light.
Sparkling foil threads used in the pattern makes this obi suitable for a formal usage.
Textile is soft silk.
Length is 460cm(15ft.18"), rather long for Fukuro Obi.
It has folding lines, and they are prominently smudged along. (described as discoloration on drawing image)
It is also slightly smudged throughout, but not disturbing for wearing.
Please see photos for details.
Although it has some flaws as mentioned, it still is a very charming item to wear!