Russian Assay Masters Marks 1795 - 1898 unidentified assay master И.З Odessa/Одесса.
In the address book of Odessa for 1877 (p. 53) in the assay office at Tiraspolskaya St., 4,
the assayer Ivan Fedorovich Zubarev (Иван Федорович Зубарев ) is indicated.
Unidentified assay master И.З
Re: Unidentified assay master И.З
Yes, it is he, but Zubarev worked in Odessa until 1882.
Re: Unidentified assay master И.З
The information was transmitted to the directories in advance. Changes could happen later. Ferdinand Ionscher - "Ф.I."- started working in Odessa in 1883.