You are looking at a VERY RARE & NEW OEM style Moped Taillight Lens.
The Tail Light Lens was originally distributed by the Motobecane Moped company but was used on several different mopeds over the years.
We have personally used this on a Puch Maxi, but it could work on many other Mopeds such as the Honda PA50, Columbia Commuter, Sachs Balboa, Sachs Suburban, Sachs Hercules, Hero Majestic Pacer and many others.