This is a Block of Scott numbers 5522a.
Issued in 2020, the stamps are Very Fine, Mint Never Hinged.
Any Questions feel free to e-mail or send a message.
Any Rainbow effect you may see in the picture is from the protective plastic over the stamp.
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These stamps were brought to you by TSS Stamp & Coin out of Long Island, NY.
We have been in business for over 40 years.