Sent from Kaliningrad, Russia. Kaliningrad is the administrative center of the Kaliningrad Oblast. It's a Russian enclave: a little part of Russia between Poland and Lithuania that has no land connection with the rest of country.
This is a first-day cover postmarked in Moscow of a joint stamp issue by PCC member countries commemorating winter sports. Specifically, hockey. PCC (Региональное содружество в области связи) or Regional Commonwealth in the field of Communications is "an organization whose mission is to carry out cooperation between new independent states in the field of telecommunication and postal communication based on their free will, principles of mutual respect and sovereignty."