Looking for info on my blue vase

[Ninotchka]

Hello!

I found your group doing a Google search on glass experts, and I'm hoping you wonderful folks might have the combined expertise to help me find out more about a vase of mine.

The mark on the bottom looks like a JB in a box. Or an OB or DB...I can't really tell. I have attached and linked below to photos of the bottom of the vase, as well as a side image. Any idea what I'm looking at here?


Bottom of vase - www.flickr.com/photos/65215187@N04/6306103799


Side view of vase - http://www.flickr.com/photos/65215187@N04/6306104117/


Thank you!