Canadair CC-109 Cosmopolitan
The Canadair CL-66 is a turboprop version of the civilian Convair CV-440 Metropolitan. The CC-109 Cosmopolitan or "Cosmo" in RCAF service became the standard VIP aircraft as well as replacing the Douglas Dakota and the North American B-25 Mitchell in light transport duties.
Source: Wikipedia — Canadair CC-109 Cosmopolitan (CC BY-SA 4.0)