Estonia. Military Swedish volunteers in Estonia 1919. A beautiful Field post cover from Reval and the Swedish volunteer K. Carlsson to a family member in Göteborg with several military unit cancels with a double-headed eagle. Censored with triangular violet cancel "SK T1. 69" (or TL) and two-line violet cancel "FÄLTPOST BEFODRAS UTAN FRANKERING". Arrival cancel "GÖTEBORG" 18.12.19. Very rare item and in good quality!