Bell Duovox Bell Duovox was a new York based company.  A press release (I lost the link) stated the following:

Alex Carozza, a New York-based accordion dealer and technician has bought the name Bell Duovox, with plans to develop it in the future. Mr. Carozza announced the news at the Opening Reception for his Accordion Museum on December 7th, 2006. Aldo Mencaccini, founder and President of Bell Accordion Co. was present to coincide with the announcement.

The website for Bellduovox no longer exists and the archive is blocked by robots.

Images eBay:

Bell Duovox Tini Titan ampliier control panel Duovox transistor amplifier