An EKG printout showing the electrical signals in John Glenn’s heart as he passed over Africa during his historic Mercury-Atlas 6 flight on February 20, 1962. The printout, 14″ x 5″, with lower section marked “E.K.G Over Africa of Colonel John Glenn, 1962,” is annotated on the reverse in pencil: “This was the heart beat and pulse rate as Glenn passed over. Wasn’t even excited was he? (3/9/62).” Displayed in a magnetized acrylic holder that measures 15″ x 6.75″ x 1″. In very good to fine condition, with trimmed edges, and areas of surface and paper loss.