This small reproduction was handed out during the original showing of the Big Berserk Exhibition in Tokyo, in September 2021. The organizers ran a mini-event themed after the Eclipse between September 16 and 21, where admissions were allowed until 7:30 pm and the venue closed at 9:00 pm. Visitors were asked to come dressed in black starting at 6:30 pm.
As part of it, copies of this exclusive "character fine mat" reproduction of volume 13's cover were awarded to visitors each day via a lottery. It's the same A5 format (5.8 x 8.3 in) as those that are normally sold in the exhibition store (see the Schierke one for comparison). Note however that they were given without a frame, requiring people to switch it out with another one.