What color is Adding Machine (USA), ca. 1942 ?

Source Crayola® CSS3 CSS4
#3c3938
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#5d4a45
 
#414a4c
outer space
#556b2f
dark olive green
#556b2f
darkolivegreen
#857877
 
#757575
sonic silver
#808080
grey
#808080
grey
#3e5c4d
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#78c08f
 
#71bc78
fern
#8fbc8f
dark sea green
#8fbc8f
darkseagreen