Crane Pattern Japanese Style Accessory Case / Wallet

It's like a wallet.
It was found in a paulownia chest and its purpose is unknown, but it appears to be unused. I removed the obi to take photos of the contents. The obi shows some wrinkles.
Size is 18 x 9 cm.
It says hon-tsumugi (genuine pongee silk), but it looks like a firm material, similar to cotton. The inside is a smooth material with a slight sheen, and details are unknown. Please understand...

〇I am gradually listing items from my parents' chest of drawers organization.

〇I have it on hand, so please feel free to comment if you have any questions...

Thank you in advance.