Watch List notes:

The Portland Collection, Commemorative Medals, Ballooning: France, Henri Giffard's Captive Balloon Ascent over Paris, at the Exposition Universelle, gilt-bronze medal, 1878, by C. Trotin, balloon over a view of Paris, rev. legend in six lines, 51mm. (Malpas 101, 102), each with suspension loop, ring and ribbon, one with 'dumbbell' suspender, both extremely fine (2)
Henri Giffard (1825-1882) also invented the steam injector and gave his name to a powered dirigible airship.