This is an original graphite drawing on sepia recycled card by Steve Teasdale. It features the genuine signature of Masters of the Air leader  Col Thomas Jeffrey. Legendary Commander of the 100TH during its glory days, he is credited with making the 100TH one of the 3RD Air Division’s outstanding units. Considered by many to be the model for the  GREGORY PECK character in ‘Twelve O’clock High’.
This is a rare signature and would look amazing in a book related to 100th Bomb group or mounted with a print.