They have two threaded posts which fit thru the grill. It is then secured from the back with nuts. Good quality badges will use hardware that won't corrode easily.

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Art Bourget

1983 300SD
1st In Class - Starfest Concours 2004
1st In Class - StarTrack Concours 2003
1983 300TDT
1985 300D

MBCA - Niagara Section