I wonder if this is either of these use cases-- “it’s clearly good silver, we liberated it from the oppressors!” or “we’ll bootstrap our new economy by only circulating re-stamped coins”, or more meant as souvenirs.
I read both versions of it. I suspect, and what you wrote about eagle being flattened fits, that it was the first and second case but small numbers of it suggest it was made between the 1917 revolutions, as RFSFR didn't issued any coins until war communism was over and in the time issues paper banknotes (and during the period specifically referred to it as "medium of exchange"). But i also read the version that it was only a short series because it was intended as souvenir, which is also probable.
Expensive custom tokens
Writing with a permanent marker over the faces of 
presidents
I read both versions of it. I suspect, and what you wrote about eagle being flattened fits, that it was the first and second case but small numbers of it suggest it was made between the 1917 revolutions, as RFSFR didn't issued any coins until war communism was over and in the time issues paper banknotes (and during the period specifically referred to it as "medium of exchange"). But i also read the version that it was only a short series because it was intended as souvenir, which is also probable.