Hey discspeed, are there any distinguishing factors with this current run of C-Lines? Are they patent tooled? They sound right up my alley, but the mold hasn't caught on very much around here. I found a CFR (and a stack of 1st runs) leftover on the shelf.
Unfortunately the non-plus look exactly the same in terms of stamp and tooling. Even the plastic looks similar to the older ones. You have to flip it over and compare the slant to tell for sure.