An American invention (the gold buttons that is), it's an article of clothing that I associate very closely with boarding school and American traditions. Recently, I saw this blazer released by Band of Outsiders called the Schoolboy blazer.
Tweed, while a really cool fabric, was never for anyone at boarding school a staple. It was something you pulled out for those lazy Saturday mornings when you had to doze through a Virgil reading or trignometry lecture. While this certainly could be considered an English boy's school blazer, I would say that this is improperly titled. If you disagree with me, please argue with me, as I'm making a wide generalization from a specific experience I had. In other news, this blazer is cool like Kool-Aid after mowing the lawn.