My mother picked this up for me at a thrift shop. I can't find a single thing other than the lining (which is distinctive) to help me ID the maker. It clearly had a leather tag sewn into the lining it that was cut off. If I wanted to keep it I wouldn't care, but I have way too many bags (I know you feel me, ladies) and I need to purge some so having more details for a possible CL post would be helpful. It looks like it may have some with an optional shoulder strap because of the rings on the outside corners. Can you help?