XF429/J-4131

XF429, the prototype FRMk10. She was built at Baginton, Coventry, and modified by HAL in 1959.
Three oblique-facing cameras were fitted to a new nose section, and Mod228 wings, (retro-fitted with with dog-tooth leading edges) with four hardpoints.
She would become J-4131 in 1974

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