Identifying a vintage box

[KBNbay]

Hi all! Curious to know if any of you out there might know the origins or maker of the box in the photo. I received it from a friend, and it was originally owned by her uncle from Italy. I ha ent been able to locate other instruments with the same type of clasps to fasten the bellows and was hoping that these might be familiar to some of you? There are no markings that I can make out anywhere on the instrument. Any help would be appreciated!

 

[Dingo40]

This is a 21 button, 8 bass melodeon or DBA (diatonic button accordion).
Although there are one or two cognoscenti knowledgeable about these things in this forum, as they are a specialty item, you may find more particular information on the melodeon forum.
See here:

melodeon.net - Google Search

Here's a newer model being demonstrated:

Another: