The second variety of a very rare technological sample with Tadeusz Kosciuszko.
Mintage of only 10 pieces (according to the State Mint).
Minted in aluminum, marked with a concave PRÓBA inscription behind the figure's head.
Underneath the ornaments are the initials of the designers KZ (Kazimierz Zieliński) and EJ (Edmund John).
Mint, with slight shine.
Aluminum, diameter 31 mm, weight 3.51 g.