Hi Adieu -
welcome as a new member! Important is to know how to post images - there are tutorials on the forum.
To help a newcomer I post your image....
Adieu wrote: Here's what I'm 99% sure is a Khlebnikov mark on a confirmed genuine 19th century article of Russian silver with known history
99% certainty is not good enough on a forum like that - as well as some gossip about the history/quote. We prefere facts.
Please look at the red arrows - the original maker was overstamped!
The cauliflower - like Court supplier´s eagle (later added) ist just a joke as well as the clumsy Khlebnikov punch.
Here an original punch:
Here some original literature: