NLM CityHopper full name Nederlandse Luchtvaart Maatschappij (Dutch Aviation Company), was a Dutch commuter airline, founded in 1966.
It was set up as a KLM subsidiary under a two-year contract to operate domestic services within the Netherlands. The Eindhoven–Hamburg route was the first international service flown by the airline in 1974. The airline changed its name to NLM CityHopper/Netherlines, following the acquisition of Netherlines by its parent company KLM in 1988; operations of both subsidiaries were subsequently merged. Despite sharing their operational structure, both companies were separate entities until 1991, when they were absorbed into the newly created KLM Cityhopper.
Source: Wikipedia
Design #1
Design #3