Silver medal 1850 Construction of the Blagoveschensk bridge over the Neva. 1850. Dies by: obverse - A.Klepikov, reverse - A.Lyalin. 160,4 g. Diameter 86.4mm. Diakov 594.1 (R2). Rare. Minor scratches and rim nicks. About uncirculated with prooflike fields and attractive patina.