Recently, while searching the net for photographs of diatonic accordions made by the Cantulia company of Germany, I found a fellow squeezer's blog filled with lots of pictures. His collection includes diatonics, piano accordions, chromatics, bandoneons, and loads of Golden Age accordions in very nice condition. He hasn't updated the first blog for a while but the archive is still available to browse. The second blog is more current. Links are below.