This small Japanese collection has one the same; http://www.geocities.jp/cato1963/acco-mine.html#lirico (http://www.geocities.jp/cato1963/acco-mine.html#lirico); which it describes as a rare model, though they've got an up-market 80-bass too.
But the best they can offer in the way of button boxes are these 1930s Olympic (left) and Olympia (right) models (sound kinda' familiar? ???):
(http://i17.photobucket.com/albums/b66/StephenChambers/Accordions/tombo-olympic.jpg)(http://i17.photobucket.com/albums/b66/StephenChambers/Accordions/tombo-olympia.jpg)
By the way, it seems Japanese 2-rows are C/C#
This very German-looking example may be the best that they made;
(http://i17.photobucket.com/albums/b66/StephenChambers/Accordions/tombo-black.jpg)
there are more photos of it here; http://nardingallery.blogspot.ie/2010/10/my-frst-japan-made-tombo.html (http://nardingallery.blogspot.ie/2010/10/my-frst-japan-made-tombo.html)
According to Yoshiya Watanabe, it seems Tombo only made their first model of piano accordion, a small one called "Paris" that had brass reeds, when it "became popular here when people saw the [1930] French film "Sous les Toits de Paris" (Under the Roofs of Paris)".