I purchased this at the BerBerJin main store, a vintage clothing shop in Harajuku. I think it's from a relatively recent era, but it's an open-collar shirt like those from the 1960s. The pattern is also very nice, and it's a great piece to match with denim or slacks. The condition is also good, so I think I can wear it for a long time. There's no size tag, but it's a size L to XL, so it has a relaxed fit.