What Is This Overprint On Russian 10k Stamp?

Any ideas as to what this over stamp is?

Thanks!

It would purport to be Russia Offices in Turkey. I haven't compared it to anything.

Yes it's a very common "Offices in Turkey" 1 Piastre over 10k

note; here in Quebec in our slang language we use piastre for dollars, I have no idea how come Turkey use it too.

Piaster is the Turkish word for Pound. I guess that's the connection ;-)

I don't think so, our piastre don't come from the pound, actually for our ancestors, the piastre ( pronounce also piasse here ) was 120 sous, so 120 sous = 100 cents, we still call a 25 cents a 30 sous . The Italian was using a Piastra, probably it come from there. It's a French Canadian thing; in the rest of Canada they don't know that name. Wiki is more confusing than other thing when I search for it.