Originally built for USAF as 55-4505 and transferred to the USCG in March 1960. The USCG operated 8 C-123B a/c and primarily used them to support the construction and maintenance of the LORAN-C stations around the world. The USCG installed APN-158 radar in the noses, giving the a/c a different profile. 4505 is currently on display at the Pima Air Museum in Tucson, AZ.