You may have noticed that just about every car on the road in Japan has a round, disk like sticker stuck on the top left of the front window. This seal indicates the date your car needs to be inspected.
 
This should go without saying that this is a replica and is not to be used to actually pass inspection. 
 
There are a few easter eggs hidden, can you find them?
 
Waterproof Vinyl
UV Resistant 
Matte Finish
Reverse Adhesive for Inside Glass Application
 
Approx Size: 3 x 3"