[Spridgets] interesting tag attached to Vin Plate on Bugeye

[ldsp]

On my new bugeye project I found an unusal tag undsr one screw that holds on
the vin platem  it read BMC-6 and is about an inch long and is made of a
medium weight plastic type material.  Hnder it was a patch of original paint
the same shape of it so obviously it has been there a long tome.  Has anybody
else ever seen one of these on their car?

Leo