The new “Pat and Mat” stamp was issued by Česká pošta on 5th Oct 2011 will cost Kč 10 and be marked with an “A” in the upper-right corner, the designation for correspondence sent by the domestic post. In the first print run, 100,000 booklets of 10 stamps will be issued. The artwork is by Jan Chvojka, a scriptwriter for the “Pat and Mat” series. On the inside left of the booklets is a trademark hologram of Česká pošta, which will, of course, make issue First Day Covers and commemorative items available for stamp collectors and diehard fans.The series is expected to boost sales in the age of email. Previous issues featuring Czech children’s classics have done well — the post office sold 1.12 million stamp booklets with characters from the Čtyřlístek magazine.