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Ad Astra Aero Mittelholzers Dornier Merkur CH in Kenja . Ad Astra Aero Dornier Merkur CH pilotted by Walter Mittelholzer in Kigocna Kenya luftfahrt ch Author PDold Third party files uploaded by User Roland zh Aircraft of the Ad Astra Aero in Switzerland Kenya in the Walter Mittelholzer Dornier Do Merkur CH aircraft