I will post a pic soon. THe clutch I have is the one on the right in the picture on page 5-62 and 6-50 of the Mannel book.
Shaft is stamped E-C4AA-C1,
Picture b on page 6-45 and F-10 is how I intend to leave it detailed. The finned aluminum portion is natural aluminum.
The inner 90% of the front face is gold-looking cad or zinc dichromate or whatever it's called.
I intend to make a stamp for "B21" (FEB 21, 1966) to duplicate the font and stamp the front in black.
Here's a picture of a fan/clutch removed from a 68 Cougar that I bought to get the fan. I sold this clutch on Ebay. My NOS E-C4AA-C1 clutch looks just like this one, except it is new and has the right Engineering Number.