Thanks all for your info on this.
After more than 30 years of serious involvment in cycling, I am amazed to find this list, an extraordinary source of very detailed information from so many of you who are true experts.
I am currently doing a little careful restoration work on my pride and joy, a 1977 Bernard Macklam which I designed myself.
Macklam was an ex-Bob Jackson builder who went out on his own in Leeds in the 70s.
When I'm done, I'll post some photos.
Emanuel Lowi
Montreal, Quebec