Letter from APO 810, Iceland 25 March 1942 to Chicago, IL, USA. Mixed franking with Icelandic 5 aur codfish (AFA 212) and US 3¢, tied by machine cancel “AMERICAN BASE FORCES / A.P.O. 810/ MAR25 / 1942”. Sent by Lt. F. A. Bryner, CO I -10th Inf. Mixed frankings are unsual, although the Iceland stamp were superfluous.