What we have here is a Voigtlaender Collinear Series II lens that was put in a Betax 4 shutter some time in it's life and has lost all of it's markings.
It matches up well with the old Voigtlaender catalogs as a Series II f5.6 lens. The Collinear is like a Dagor, 3 cemented elements but not identical.
The elements when you take them out have some clues like serial no's written in pencil etc. but no brand names. Each one has II.4 stamped lightly in which I take to mean Series II No. 4?? 38mm dia. glass, symmetrical, and 8" focus match the old catalog specs. A single group will give you a usable 15" lens.
Note that the Betax is missing it's trip lever, and while it runs perfectly, you'll need to use a cable release for all actuations. This will cover 8X10. A very nice old lens. $165
