BTW, is this advert up on Glass Study? I've searched on "Sherdley" and also looked for PGGTR 1961, but couldn't find it.
I guess it's the May 1961 issue, p592 if I've interpreted Frank's code correctly. I'm sure that one will be at Broadfield, unless Frank wants to do a page scan?

According to my notes, I did photo a page from that issue when I was there... but this is a full page, full-colour advert (the one in my book, p116) :huh: ... unless they posted two adverts in that issue?