Sweden. Facit 82 cover, 10 öre on interesting postcard with notation "Fältpost". Sent from STOCKHOLM 1 1.5.18 to HELSINGFORS HELSINKI 10.V.18, then forwarded by field post to the Swede Sixten Sandberg who served as platoon leader at 1st Grenadier Regiment 1st Wasa Battalion 2nd Company. The stamp with round corner of less importance. Scarce and sought after item.