I wouldn’t place too much importance on the build date for determining its final radio fit – within the high-vibration, high -G environment of a fighter sets would be routinely removed for maintenance and re-tuning and a ‘ready -to -go’ set substituted in their place. Official modifications would also be carried out from time to time and, on occasion, sets would be replaced with newer kit. Many of the units that made up an installation were interchangable between US and UK equipment and it is not uncommon to see units fitted with US and UK plates.

Robs