Banksy - FCK PTN!, including a First Day Cover with cancellation First Day.

The collectors value are the Stamped envelope with postal cancellation stamp on which the name of the work is written: "ПТН ПНХ!" as well as the date February 24, 2023 (anniversary of the start of the war in Ukraine).
Editions realised by Ukrposhta are rare legitimate limited editions approved by Banksy. One can find images of these editions on Banksy's own Instagram page.
Link to the post from the official Instagram page:
https://www.instagram.com/reel/ClEaVDJOPaM/?igsh=MWJvcXNyZmc0enVndw==
There is a QR code in the lower right corner of each stamp. Point your smartphone camera at the QR code and go to the website where the product was made.
Authority certificate: @Banksy signature on the board is present on the front right side of the card.
Banksy's copyright can be seen on each stamp and postcard.
Set including Stamps sheet of 6 stamps, postcard and envelope - authorized @Banksy
Author — graffiti on the envelope - @BANKSY.
Release date - 24. 02. 2023
Stamp:
Author — graffiti on the stamp @BANKSY
Printing — 1 500 000 / 250,000 sheets (6 stamps each)
Size — 109x109 mm
The number of stamps in the sheet — 6
Card PTN PNH! 2023 - original authorized @BANKSY - 1 pcs
Printing — 100 000 copies
Printing: Offset lithography.
Isuue date (year) — 2023
Envelope
Author — graffiti on the envelope - @BANKSY.
Printing — 100 000
Envelope PREMIER JOUR "ПТН ПНХ! (FCK PTN!)" First Day Cover with cancellation First Day - 1 pcs
Art Envelope - size C6
There are also is a description of events in Ukrainian and English on the back of the envelope.
@Banksy, 2022. Photo source: official website official website http://www.banksy.co.uk/
Banksy is one of the major players in Street Art, among Blek le Rat, C215, Faith47, Keith Haring, Jef Aérosol, JR, KAWS, Keith Haring, Miss Tic, Mr Brainwash, Richard Orlinski, Invader, Shepard Fairey (Obey Giant),
Vhils, etc.