I recently got a circa 1881 Voigtlander lens (based on the s/n list here). It looks almost identical to this one only is a bit smaller and has a one on it instead of the 3.
It covers 5x7 with no problem but I don't have anything bigger than that to see what its limit is. Both the front and back glass show two bright, larger reflections and a third small dim one.
Can anyone tell me anything more about this lens?