The Rossica Society is keeping its excellent work on the Virtual Gallery. This section of the website presents the scans of some extremely interesting collections, kindly provided by their owners.
There is a wealth of precious information, given for free. This effort has to be highlighted. The two most recent additions to the Virtual Gallery are especially mind blowing.
Firstly, a wonderful portion of the Werbizky collection of Zemstvo, dealing in particular with stampless covers. Dozen of scarce postmarks and an in-depth travel within this difficult area. I especially liked the parts dealing with Zemstvo districts that never issued postage stamps, but maintained a postal service, usually free of charge. > click here
The second virtual addition is the collection of covers of the Leningrad Blockade (1941-1944), formed by Alexander Kolchinskiy. There has not been a lot published in Western language on the subject, so this presentation is most welcome. > click here