Originally built as a single-seat FB.50 and delivered to the Swedish Air Force as a J28B. Converted to a two-seat trainer in 1959 and redesignated Sk28C-3. Around 1980 it was donated to the Royal Norwegian Air Force Museum where it intially was painted in 336 Skv colours. In 2012 it was on display as a training aircraft with 337 Skv. The squadron had 6 T.55s on strength between 1952 and 1956. They were coded ZK-1 to ZK-6. ZK-7 was given to the displayed aircraft as it never served in the RNoAF. The original Vampires were returned to the original owner, the RAF, as a gift in 1956.