So, no, I don't recall seeing any '60s FIA Cobras being fitted with eye level auxiliary brake lights.... but I do however need one to satisfy local road registration requirements.
As well as keeping officialdom happy, it may also prevent some dozey dummy rear-ending my car....so I'm happy at a number of levels to comply.
Some pics...
Rear view:
Front view showing clamp and bracket:
Another rear view:
Cheers,
Glen