Oshima Tsumugi - Purple with Pattern

This item was found while cleaning out my parents' home.
I was told it is Oshima Tsumugi, but I cannot confirm this as there are no accompanying certificates or fabric scraps.
Therefore, I do not have detailed information about it.
It has been stored in a chest at home for a long time, so there are folding creases.
The outer fabric has no noticeable stains, but the lining (white fabric) has age-related stains and dirt.
Please refrain from purchasing if you are looking for perfection or are sensitive to such details.
We ask for your understanding that this is a used item that has been stored for a long time before considering your purchase.

◯As I have no expertise, I apologize, but please judge the condition from the photos.

◯Size
Length: approx. 153cm
Shoulder width: approx. 30cm
Sleeve length: approx. 48cm
Sleeve width: approx. 32cm
Cuff width: approx. 22cm
Front width: approx. 23cm
Back width: approx. 30cm

*These are amateur measurements and may not be perfect.
Please allow for discrepancies.

○ We do not accept price negotiations.
Please understand.

○ To prevent trouble, we do not create dedicated listings.
Please understand.
Even if negotiations are in progress, priority will be given to the person who presses the purchase button first.

○ The item will be folded and shipped in simple packaging.
Please excuse any folding creases.