Please help to identify if Russian silver sugar bowl is authentic

[mingas]

I bought Russian silver sugar bowl, it looks very good quality, but I don't see a year of make on hallmark, I can only see fist two numbers 18.. Can you please say your opinion about this item. Pictures below. Thanks a lot
http://i1228.photobucket.com/albums/ee457/mingas1/Russian%20Silver%2084%20Sugal%20Bowl/858736414_o.jpg
http://i1228.photobucket.com/albums/ee457/mingas1/Russian%20Silver%2084%20Sugal%20Bowl/858736488_o.jpg
http://i1228.photobucket.com/albums/ee457/mingas1/Russian%20Silver%2084%20Sugal%20Bowl/858736476_o.jpg
http://i1228.photobucket.com/albums/ee457/mingas1/Russian%20Silver%2084%20Sugal%20Bowl/858736426_o.jpg
http://i1228.photobucket.com/albums/ee457/mingas1/Russian%20Silver%2084%20Sugal%20Bowl/858736525_o.jpg
http://i1228.photobucket.com/albums/ee457/mingas1/Russian%20Silver%2084%20Sugal%20Bowl/858736497_o.jpg
http://i1228.photobucket.com/albums/ee457/mingas1/Russian%20Silver%2084%20Sugal%20Bowl/858736556_o.jpg
http://i1228.photobucket.com/albums/ee457/mingas1/Russian%20Silver%2084%20Sugal%20Bowl/858736536_o.jpg
http://i1228.photobucket.com/albums/ee457/mingas1/Russian%20Silver%2084%20Sugal%20Bowl/858736510_o.jpg

[Qrt.S]

Looks quite good to me. The assayer AK )Latin AK) is Andrej Kovalsky in Moscow 1821/22-1856 and the maker's mark ИЗ (Latin IZ) is Ivan Zaharov 1856-1896. Looking at the years they tell you that your bowl's smudgy year mark is most likely 1856.

[Dad]

Looks quite good to me. The assayer AK )Latin AK) is Andrej Kovalsky in Moscow 1821/22-1856 and the maker's mark ИЗ (Latin IZ) is Ivan Zaharov 1856-1896. Looking at the years they tell you that your bowl's smudgy year mark is most likely 1856.

Hello, Qrt.S.

The kind of town's mark speaks about more last period. I think it's 1878-1882.
And "AK" isn't Kovalsky.))

[Qrt.S]

#Dad
Yes it is possible. This kind of town mark was used around 1850, but as well a rather similar one around 1880. If it would be the latter period then AK is of course not Andrei Kovalskij but an assayer unknown to name (1879-1883). The assayer is, anyway, not so important as the maker is and he is still the same.