I'm looking for anyone with photos or information about these high-range monsters from the 1970s. Here's what I've been able to piece together so far: All models had a relatively long, narrow bell that expanded rapidly to a 5" diameter. The Olds CHR and Reynolds Clarin (model TU-08) had a tuneable bell design without a tuning slide between the leadpipe and valve assembly, while the Reynolds ERA (model TU-15) had a main tuning slide, albeit very short, and no tuneable bell. Silverplate finish. Alan Rouses' review of the CHR is here. I've posted a 1974 advertisement for the Reynolds ERA here.