Geropa was a garage business, Garage- en Reparatie-Inrichting "Geropa," opened by John Moos in Amsterdam, Netherlands, at Plantage Muidergracht after his earlier car venture, Humo, collapsed. There he again tried to bring his own car to market, building a new chassis for a four-seater with a four-cylinder engine using European and American parts. Moos exhibited the chassis under the Geropa name at the 1922 RAI exhibition's outdoor grounds. A contemporary…