This appears to be a Shosoin pattern kaishi (small paper) holder. It doesn't have a gusset, and when opened, it has a divider. There are two places to put things. Please use it as a fukusa (silk cloth used in tea ceremony). I think you can put thin items in it. It's a rare item, so there is no box or explanation. It has been stored at home. I would appreciate it if those who understand this would purchase it.