Those components were clear cadmium which is bright silver when fresh plated but dull to gray as they oxidize. From what I can see the steel components in your picture look to be cad plated. OSHA has run a lot of the cad platers off shore because of the chemicals involved but there are still lots of them around in some sreas and we have plenty of them down here along the Texas coast due to the off shore drilling industry; cadmium resists salt spray etc. really well. If you need a cad plater pm me and I will connect you with mine. They accept shipped in work and they ship back. They have a $90 minimum so it behooves you to send them components for ten carbs at least. They also dip aluminum in alodine which looks close to the original dark gray finish NOS AFBs were IMO. Not dead on but close.
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