A dealer at a flea market had a 77gram calling card case that was, according to him, made in Imperial Russia.
To support his claim he pointed out the stamp inside the case lid and base being the 84 standard mark with the Russian Eagle.
What was intriguing is that stamp was unfamiliar but he assured that the dating and his assessment were correct.
One fact ignored was there is another punch along the rim of both pieces. This punch has a ‘K’, a star with a hammer and sickle and a standard mark of 875. His explanation was that although the piece was early 20th century it was re-assayed later, which accounts for the stamp on the rim.

A conclusion might be that the undecorated case was assayed in the USSR after 1958, possibly in Kiev, and the decorative panel added later in the China by a silversmith who had an Imperial Russian type punch.
Has other readers encountered this type of marking as the 84 and eagle does not appear in any of the book consulted?
In spite of the apparent conflict of the punches and dating, the price was right so it was purchased.
Fred Sinfield

I have some additions about uncommon Russian marks.
The first is a '84' Russian mark (possibly St.Petersburg, 1908-1926) accompanied by another mark (unknown to me) looking as '925'.
Further oddity is that '84' zolotnicki corresponds to a silver fineness of 875/1000, in contrast with the '925' mark indicating, presumably, 925/1000 fineness.

The second is a Moscow 1908-1926 mark (female head towards right) obliterated with " X " accompanied by maker's mark in cyrillic letters (possibly KURNIKOV R) reflected as in a mirror.
Apparently who used the mark ignored the cyrillic alphabet.
Giorgio Busetto

In the mark above the Cyrillic characters are wrong. They look right in the mirrored image below