It just occured to me, this may be what was done with a set that I have. The box appears to be older than the razors, and the razors do not have the days of the week on them anywhere. Then again, I'm not sure if there's really any way to tell one way or the other...
How can you tell that the box is older than the blades?
How can you tell that the box is older than the blades?
It's just a guess based on the condition, materials and style of the box as compared to the razors' stamps, scales, style, and condition. None of these things are certain (as far as I know), but they are helpful for ballparking.