Tea pot

[Lessing]

Hello, I cannot find the silversmith with the mark on my tea pot.The lid has three marks, silver grade 84, makers mark A.? and city mark St Petersburg.
In the bottom of the pot you find the assayers mark AT/1846, makers mark A.?, silver mark 84 and city mark St Petersburg. Who was the silversmith?
Regrds
Lessing

[AG2012]

Hi,
The maker should be Adolf Sper or Sperr (AS with pellet), died 1859.
Assayer Dmitriy Tverskoi.
Notorious question: are there marks on the handle and the spout? Always forgetting when it was legislated to have all parts assayed before assembling the entire object.
Regards

[AG2012]

Adolf Sper was born in Finland, became apprentice in 1816, a journeyman in 1819 and finally a master in 1829. He had a workshop in the house of Schauman on Povarskoiy street in St.Petersburg.

[Qrt.S]

Some more about Adolf Sper/Sperr. He was born in the county of Kirkkonummi/Kyrkslätt west of Helsinki 3 rd November 1799 and died 6th July 1857. My source says he became journeyman 1821, but? He worked then with master Gustav Lindgren i St. Petersburg. He had as a master a workshop of his own as from 1849 at the mentioned address. He kept a lot of apprentices. Adolf married 24th June 1830 with Anna Charlotta Aurin, born 1806 i Wasa in Finland.

[Lessing]

Thank you AG2612 and Qrt.S for your thorough answers. There are no marks on the handle nor the spout.
Regards
Lesssing