This is a Massachusetts REJECTION STICKER used during the 50s and 60s.
This rejection Sticker is extremely popular with STREET RODS and classiccs far from restored.
You had better use these with care and only on cars that have classic plates and DO NOT REQUIRE INSPECTIONS.
These are "peel and stick" stickers BETTER than the originals and they attach to the inside passenger side of the windshield.
The backs allowed for personal car information.