I also found this...I'm guessing there wasn't an official name.I've seen these called Frame bags, but I don't know if that's the official name or just a description.
this one comes close, but doesn't have the hook and round lock feature.
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BALENCIAGA Calfskin Suede Frame Bag Brown Black | FASHIONPHILE
This is an authentic BALENCIAGA Calfskin Suede Frame Bag Brown and Black. This stylish shoulder bag is crafted of brown suede leather. The bag features black rolled leather shoulder straps and black leather top trim with polished silver hardware. The top opens to a spacious black fabric interior...www.fashionphile.com
