This saxophone-shaped blow accordion comes from Czechoslovakia. It is stamped Haro. This is the first company that I have found different versions of blow accordions from. The large photo and gallery pics immediately below, are of only an 8 key version. It is lacking the 2 bass keys/chord keys that some models came with.

Source: eBay.com
Source: eBay.com

This following example of a Haro blow accordion, has the 2 extra bass/chord keys.

Haro blow accordion

Source: putusinthezoo
Source: putusinthezoo

Another seller also had a 10-keyed version for sale a year or so ago. This is how he/she described this blow accordion:

It is 18 inches in height, 6 inches in depth and opening is 4 inches in diameter. There are 8 paddles on the right and 2 paddles on the left…The mouth piece is made of smooth wood, is 1 inch and sturdy. The [Haro toy saxophone sounds]…similar to a harmonica…

Source: eBay.com

To my eye, the Haro bares a striking resemblance to the Hohner Saxonette from Germany. Even the size is similar to that of the Saxonette. One seller measured their Saxonette to be 17 ½” in length, with a bell diameter of 4″.