Dan Fromm , Oct 06, 2007; 07:43 p.m.
Hmm. You have the lens, why don't you ask it what it does?
About what it is. IIRC, Argus' last gasp was a line of 35 mm SLRs sourced from Chinon or Cosina with lenses from the same maker. Sorry, don't recall which, its been quite a while and as a Nikon bigot I paid little attention to low end gear.
55/2.0 for a 35 mm SLR is probably a 6/4 double Gauss and most of them are pretty good. But as I said, ask the lens. Count reflections, and then you'll know whether its 6/4 or something more complex.