Does anyone know the Federal Spec no.s for the grey on the airframe of the Aerobee 150 Standard unpainted round. I think this is the same round that is on display at the Air and Space Museum in DC. if not the Fedstd no., then a common nomenclature (ex. Ghost Grey, Gunship Grey, Ect.). If I have to I'll go there with a set of color chips for an eyes on check but I was hoping some knowledgeable saint here might have the info to share and save me the trip. Any info would be of great help. Thanks.