I know this thread is a bit old but sometimes it takes me awhile to get around to doing things. As a follow up to my previous post made here back in 2013, here is a recent photograph from my Agfa/Ansco Viking PB20 7.7 with the Anistigmat lens. I am not certain but I believe the lens is a triplet.
I have been working with this camera a bit since the first of the year. It is very lightweight, even with a roll of 620 film on board, and this copy seems to be relatively light tight. I have been over exposing the film as the shutter seems about a stop off. Shooting ISO100 film at an EI of 50 seems to work pretty well so I doubt I'll try to tear the shutter apart.
I did have to inject a very small amount of 3 in 1 oil into the wind on key as it was very, very tight. Worked great and the film winds on perfectly now.
This is pretty much a full daylight camera with shutter speed of 1/25 and 1/100 and apertures from f7.7 through f32. I have had some luck using the Bulb mode for longer, indoor exposures but this obviously requires setting the camera on a steady support and carefully holding the shutter open on bulb. The images with Arista EDU Ultra 100 and box stock developing have been low contrast and they definitely benefit from the use of a lens hood. I built one using cardboard and some black gaffers tape that does quite nicely.
Overall it is certainly not the world's most awesome camera, but it has been a pretty reliable performer. It is very light and, of course, the 6x9 negative can hold an awful lot of information. The simple triplet lens does a very good job if you use a lens hood. Since it takes a bit more effort to get the shot it certainly can't be accused of being a high speed sports camera, but for static subjects it is very capable. It is a little bit of an inconvenience respooling 120 onto the 620 spool but once you do it a few times it is pretty painless.
I recently put a roll of Kodak Portra 400 through it. I'll have to post the results if they are worth looking at. I'll try to get around to it a little quicker this time around.