Upload & Sell: On
No, current (when you can find them). Cosina began leasing the Voigtländer name in the late 90s, from memory. Some refer to these lenses by just "Voigtländer", but many refer to the lenses with both names. The 12/5.6 is a small lens, as is the 15. And the 12 I bought new last year came with a filter attachment, too. I have a 77mm Cokin ring screwed into mine, and I use grad filters for most outdoors images.
You can see the whole range HERE.
The optical quality of the 12/5.6 is stellar, and I have shot many interiors with it. Distortion is less than the now-fabled Nikon 14–24/2.8 (I owned two copies of this lens and know it well) at the wide end.
For the work you were considering, either the 12 or the 15 would be very suitable, I feel.