I thought I'd follow the earlier post about prewar-postwar celluloid veneer Viennas with some photos of those models in fun colors. These comparatively wild veneers aren't what you'd expect from today's more conservative folk-traditional accordion industry (wood cabinet, anyone?). Of course, there are exceptions to this rule, like Hohner's Corona II and III Xtreme, and odd boxes from a few other European makers. The 'yellow' finish shown below may be the 'gold' option listed in the 1929-1930 catalog, I'm not positive. Whatever you call it, it sure is nice.
These photos are from the collection of Raymond Laforest. Ray has applied the pink tapes to the bellows of the green accordion, but yes, that is its original green celluloid. The keyboard appears to have been replaced with one of the unpainted "Presswood Pokerwork" models. Ray was an enthusiastic accordion player, repairman, and collector from Quebec who amassed a bazillion accordions in his lifetime and enjoyed sharing them with everyone he met. You can visit his website and memorial here: http://raymond.antonakos.ca/
Finally, I know the Corso at the bottom isn't one of the 1929-1950(ish) Vienna models being discussed in the original post, but I wanted to show another rare celluloid color. In North America, you usually see the Corso in red or black; models in brown, blue, grey, silver, or purple are quite rare. It wouldn't surprise me if they're floating around in other weird colors, too.
Another variation of the Corso was to have it factory-fitted with eight Stradella basses instead of the usual eight diatonic basses. Some European Corsos were tuned with two minors in the bass, a popular layout in Finland and other parts of Scandinavia.
At any rate, what a beaut'!