Per Cameraquest
The original 25 Voigtlander finder introduced in January 1999 did not have brightlines. In January 2001 a new 25 brightline finder was introduced with the SC 25 lens for Nikon and Contax rangefinders. Over the next few months the new brightline began shipping with the 25 Leica screw mount lens. If your 25 Voigtlander finder has no brightlines, it is the older version. Both versions use glass optics and a hard to scuff outer plastic casing. Like most wide angle finders, it has no manual parallax compensation -- but it does have parallax compensation marks in the finder. The lower dotted brightlines indicate the approximate view at about 3 feet. The upper solid brightlines indicate the approximate view at infinity. 25 VF Tech Specs: 92% of view at 3 meters, no brightline, 4 elements in 4 groups, .49 magnification, -1 Diopter, weight 30 grams.
Bob