These have since been treated for toning on their faces. See scans - inspect please. We have been dealers for 25 years. The item "#785-89 Army Heroes Set/5 1936-7 First Day Covers Dorothy Knapp Hand Painted" is in sale since Tuesday, February 23, 2021.This item is in the category "Stamps\United States\Covers\FDCs (pre-1951)\1931-40". The seller is "weiszcovers" and is located in Chicago, Illinois. This item can be shipped worldwide.