Glenn.
To link these registrations, there needs to be a common model description, and we can do this without affecting the FAA auto download.
I suggest ...
Douglas C-118A Liftmaster (DC-6A)
The aircraft began life as USAF 53-3290 (del. 10/20/1955) and then Bu 152689 with the US Navy.
The full cn is 44661/628 and carried the code 689 when with the USN.
Strangely Joe Baugher shows no reference to its civilian registrations.
Malcolm.