Postage stamps and postal history of North Ingria

The Republic of North Ingria (Finnish: Pohjois-Inkerin tasavalta) was a short-lived state of Ingrian Finns in 1919–1920, which seceded from Soviet Russia after the October Revolution. Its postal system was operated by the local government in co-operation with the Ministry of Transport and Public Works of Finland and the Finnish postal service.

Source: Wikipedia — Postage stamps and postal history of North Ingria (CC BY-SA 4.0)