Exposition Universelle et Internationale, 1905 Liège, Belgium

The Exposition Universelle et Internationale de Liège in 1905 commemorated the 75th anniversay of Belgium's independence. It was open from April 27, 1905 to November 6, 1905, and had approximately 7,000,000 visitors.

Evidently Alexandre Lion had an incubator exhibit at the exposition, but the only evidence I've been able to find is the postcard below.