This coffee pot is most likely made by Cyrillic PK, i.e. Robert (Roman) Kohun (1842-1883) in St. Petersburg. Nonetheless, there is a question mark here. Some sources claim that Kohun worked with Nicholls&Plinke (NP) 1865-1868, other that Kohun was N&P’s partner 1842-1879. The pot carry the assaying year 1873(?)….so?
Can anyone specify and/or provide more information?