Nice fully legible piece in patina on both sides.
Very good details.
Obverse: bust of the Tsarina in drapery, to the right, in the rim the legend:
Б М АННА IМПЕРАТРИЦА I САМОДЕРЖИЦА ВСЕРОСИСКАЯ;
Reverse: crowned eagle with scepter and apple, in the rim legend:
МОНЕТА РУБЛЬ 1738;
МОНЕТА РУБЛЬ 1738;