RUSSIA. Nicholas I/25th Anniversary of the Czar as the Head of the 6th Prussian Regiment in Brandenburg Silver Medal, 1842. PCGS SPECIMEN-63 Gold Shield. Dia-566.1 (R3). Diameter: 42mm. By K. Fischer. Obverse: Bare head left; Reverse: Crowned coat-of-arms. A fairly <strong>RARE </strong>medallic issue in silver, this alluring specimen features intense relief on the portrait and is largely free from toning, though some scattered, light hairlines are noted, as well as a subtle smoky nature as one approaches the obverse peripheries.