Alexander I (1801–1825). Half-ruble or poltina, 1817 ПС, СПБ, Saint Petersburg.

Obverse: МОНЕТА - ПОΛТИНА. A double-headed eagle with outspread wings and a crown, holding a scepter and a crowned globe; below, (variant) and (date).
Reverse: Within a wreath formed of an oak branch and a laurel branch: ЧИСТАГО CEPEBPA 2 3OΛOTH 10 1/2 ДOΛEИ (mint mark), beneath a crown.
Bitkin 158 (1A); Silver - 28 mm - 12 h
This is the second-highest grade!
NGC MS 66 (6771454-002).
Very high technical grade with a lovely collector’s patina. Mint condition.