Celestion G12T-100 Hot 100 12" 100-Watt 16ohm Guitar Amp Speaker 2020s - Silver

Have four of them, the guy I got them from about 10 years ago still had boxes for them and said they were used in his Marshall cab from the late 60s to mid 70s, but I honestly don't know too much about them your guess is as good as mine. I do know that they have always been used together and the set of four has never been broken up so they all sound in tune