are you sure? These are 3 of 67Firebird400´s pics he once has sent me, showing the trunk of one of his pristine 67 Firebirds. He´s normally very accurate concerning the originality and correctness of his cars and their options...
I´m just sharing these 3 pics with you:
The blue spot you see on the one I posted above is on one side only; so depending on how this inflator bottle is turned it can show a white card only, too. But to be honest, I don´t know if the one shown in 67Firebird400´s pics is completely white or if it´s a turned bottle only...