Manufactured by Bell Radio-Television Corporation Ltd in 1967.
4 valves and a silicon bridge rectifier. Around this time Bell switched to transistors and there were no further valve-based Colts produced - this was the last model with the warm glow.
Generally easily spotted by the black-painted badge riveted on the rear. There is space for a model code on this badge, but no examples have yet been seen with the code stamped in. The other identifying feature is the power transformer being mounted on an angle.
Intermediate Frequency: 455kc/s