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Wow! Incredibly 1980s 21st birthday card, presumably for a young man. The card features a very 1980s-stylised illustration of a sports car and keys, and embossed in gold the front reads "21 TODAY!".
The card is in excellent, unused condition (with original packaging and envelope). It measures 19 cm x 11 cm and inside the card reads:

"It's time to
just enjoy yourself
On this your special day,
And hope that
when it's ended,
May its gladness
always stay.
HAPPY TWENTY FIRST!