[4-2v cyclone]

Ive seen old pics of early compition cobras with flame thrower ignitions, were these original from Shelby like this? I have an NOS one, but mine has a chrome cast plate on top, and the pics ive seen they appear to be painted, does anyone know what its worth? I was thinking about selling it, theyre pretty rare, but dont know if they bring any money.
thanks
Mike