Takes me back. No, I never had A Charles Roberts and don't remember knowing anyone who did but I grew up just south of Boston, bought my Peugeot UO-8 in 1967 from the Bicycle Exchange, raced out of Cambridge 1977 and 78 and worked at the Bi-Ex in '78. Picked up a TA crankset there to put on my post-racing days bike but first closed out my racing climbing Mt Washington on that crank, a cut down old outer ring and a singe 28 tooth! The Peter Mooney of my namesake then got the TA as a 52-42-28. (Retired racer. Gotta have the 52-42.)
I'm guessing you remember the Bi-Ex owner, Ben Olken (sp) and that larger than life French guy. (Struggling with my old nemesis, names.)