OK, now that you got me delving into this, I have noticed something interesting.
Here is a closeup of the corner of the "dark argent" depression around the engine numbers.

You can see the little square texture pieces. It look to me, through the magnifying glass, that the texture pieces are the same color in both the light and dark areas; they look like small flecks of metal.

It looks as though the difference in appearance is because the recessed area is painted black while the raised portion is chrome. You can see the square flecks laying across the black paint edge, implying that the metallic flake material was applied after a black paint coat.

Under magnifier, the light area looks just like the argent on some light center caps that I have.

Robert

Last edited by rftroy; 10/01/12 03:59 PM.

AAR 4-speed 3.91, Tor-Red;
70 440 6 pack Roadrunner 4-speed 3.54, Plum Crazy;
68 Formula S conv 383 4-speed 3.23, Electric Blue;
69 Barracuda conv Slant 6 OD4 2.94, 71 B5 Blue;
78 Lil' Red Truck, Red;
70 Challenger S/E. 505 6 pack, Passon 5-speed, 3.55, B7 Blue