Most Componons are fine. Componon-S lenses are better, and the APO Componon HM lenses are fantastic. But, for 3x enlargements, you should be pleased with a well treated Componon. My 135 Componon has the chrome barrel, too, and covers 4x5 reasonably well.
The Componon is a 6 element Gauss-type lens and is optimised for 10x enlargements. At 3x to 4x enlargements, you will get some great results. Never mind the age as long as the lenses are clean.
b&w is less demanding for an enlarging lens than colour.
I haven't tried enlarging with one, but so far I've had quite acceptable results using a 150/5.6 Componon in a shutter to expose negatives; it also seems to be acceptable with the front group removed, as about a 265/12.5. More after I get it mounted on my Speed Graphic...