Kargopol overprint stamps - rare Russian provincial issues

or is it a ROPiT stamp with the same postmark, it's ROPiT branch from Rhodos Island. ROPiT - Russian Society of Shipping "&"" Trade, based in Odessa. There were many branches in Russian ports on Black sea and in Levant area: Konstantinople, Rhodos, Mont Athon, etc

I'm also looking for information/documentation or catalogues about revenues and cinderella's etc. from Russia, like:

specialized catalogues.
articles from magazines.