Bachman-Turner Overdrive used Model Ts. Exclusively, as far as I know.
I remember one concert I went to. I was eyeing the equipment, and saw they were using Marshall amps, just like every other group in those days. Then I thought something looked funny about the amps. I looked closer. What they were really using were Sunn Model T amps in cases made to look just like Marshall cases. I don't recall if there was any logo on the front, but, if they went to that length to use their Sunns in public, I'm sure they used them when no one could see.