Can I kick it, Yes JoKon

I have just bought a nice accessory for my '57 Oval. These are reflectors you mount on your semaphores, so when a cars lights shine on them, you are clearly visible in the dark. Ain't that bright thinking. These are said to be extremely rare, and indeed a quick search of the net resulted in nothing. These happen to be NOS, in the box, never ever mounted before. So if any of you connoisseurs out there happen to know something about these, please let me know.
You can also let me in on your thoughts of using NOS or not. I personaly think it is kind of sad to let these gems end up on a shelve, on the other hand they are a piece of history and should be kept safe from damage.