67 GT350 Approx 1.5"x1/8" Rubber disc was on lower side rear seat rear platform

[lawrence67]

Anyone have an idea the purpose and location of this rubber disc?
PL

[Shawn]

I believe it was a cushion/support from the underside of the rear seat stationary platform.

[430dragpack]

It is usually stuck in the middle, underside of the rear fold down seat panel.  It helps keep that panel from rattling on the floor pan.  Not sure if '67s have one, but on a '69-'70, there is a raised rectangular area in the floor pan right above the rear axle, that it typically rests on. 

[lawrence67]

Thanks, logical, installed today.
PL