Very rare half-penny with an error on the eagle side - LITVNIE (missing the letter A, plus a circle in front of the cross). Highly estimated in the specialized catalog of the Huletski-Bagdonas duo (II on a scale of ten, where I is unique).
Variety with Renaissance-Gothic inscription on both sides.
Very nice, with a glossy finish.
Comes with an envelope by Tadeusz Kalkowski (but from a different variety of half-penny).