No tartan clad Bay City Rollers fans in '69-70.
I know what you mean though - it'd look terrible with a raglan sleeve.
The whole use of tartan was basically ruined by the Rollers as that's what everyone has associated it with since about '73-4.
Same thing with the Charlie Chaplin moustache. Hitler made it his own and now its a symbol of evil!
Interesting Boston tale.
You are right about tartan being ruined by the Rollers and their fans. I know they weren't around in '69 but I was trying to conjure up the image. After my paisley silk scarf I used to wear a tartan scarf for a while (pre Rollers and a little bit early Rod Stewart). I also had one or two tartan ties for formal occasions.