Gang Green 68 GTS

Has anyone seen one of these before ?? Gyromatic Safety Control?? This is in the trunk of the 68 GTS I bought earlier this year. I was told that it was used back in the 60's by Police Dept. and Fire Dept. and Racers as a safety device. I'm 57 and I never heard of it. Perhaps there is someone Older than I that has seen them before or remembers them ???

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