This is a vintage summer sha Maru obi
with graceful bridge and 'sasa'(bamboo grass) motifs, which are woven with colorful threads.
Wrong side has colorful and large butterfly motifs, which are dyed on its 'monsha'(transparent silk with woven pattern) 'tsuyu-shiba' (dew and grass) background. (Main parts of tare, otaiko and maegara( front patterned part) are embroidered.) Partly, the pattern is set upside down, and it's to be tied in 'hikinuki' style.
Right side is transparent silk sha and has soft touch.
Wrong side is exquisite silk and has soft touch.
It has flaws such as rather prominent discolorations and slight patinas (A) on its background, but it still can be tied on vintage kimonos!
Please check detail photos.
Enjoy its distinctive vintage design!
*Approx background color - off white