Calligraphy Nib Holder

So I told my mother and aunt that I wanted to learn calligraphy. Being the kind women that they are they gave me all of their old calligraphy supplies. One item that I found to be interesting is this nib holder. I have never seen one like it before. I tried searching for it online; however I was unable to find any information about it. Has anyone ever seen at calligraphy nib holder like this before? If so do you know anything about it?