These are Bausch & Lomb safety glasses. The size is 48-20, which is a Japanese size. They still have their luster and are in near-deadstock condition. They don't look like they're from the 60s. The lenses have non-prescription navy 15% tint. I don't really want to sell them, so I don't plan to lower the price from this point. If you have any questions, please comment.