Russia For Poland Weight of 1 Ducat Coin 25 Zlotych 1817 IB Warsaw. Alexander I (1801-1825). Obverse: Two-headed Russian eagle under the tsarist crown. On the chest, against the background of an ermine mantle; a shield with the Polish eagle. At the bottom; initials I-B. Reverse: Weight face value and date 1817. Brass 4.83g. Edge cordlike leftwards. Bitkin X1273 (R4) RARE