Delivered to the USAF as RC-121D 53-554 in 1955. Later converted to an EC-121D then to an EC-121T. Stored at Davis-Monthan AFB in 1976. To the Pima Air Museum in 1981.

As flown by the 79th Airborne Warning and Control Sqdn, Homestead AFB, FL until the mid/late 1970s

In the early seventies, the 552nd AEW&CW regularly deployed EC-121s to Keflavik at Iceland. This photo may have been taken there (needs confirmation). This aircraft is now preserved in the Pima museum in Arizona.

Constructed as a RC-121D and delivered to the USAF as 53-0554 in October 1955. Redesignated as EC-121D in September 1963. The first EC1-21 to reach 20.000 hours (in 1968). Redesignated as C-121T in Septmber 1970. Transferred to the USAF Reserves at Homestead AFB in October 1974. Retired and ferried to Davis-Monthan AFB for storage in February 1976. Transferred to the Military Aircraft Storage and Disposal Center (MASDC) with inventory number CK0197. Transferred to Pima in 1981. Judging photos, the aircraft underwent restoration between 2012 and 2017. Photographed outside again in October 2019 with a fresh coat of paint.

Delivered to USAF 10.55 as an EC-121D. Later EC-121T. Retired from &( AEW & CS Homestead AFB Florida by 08.74.. Stored at DM and later passed to the Pima Museum.

Now moved to the restoration compound at the Pima Air & Space Museum, hopefully, she will be back on display soon looking as good as new.

Delivered to USAF in October 1955. Latterly served 79 Airborne Early Warning and Control Squadron based at Homestead AFB. Retired in February 1976 and now preserved at the Pima Museum.