Gary,
I own a 66 Eldorado and found out the Fleetwood Series cars (FWB, Sixty Special and Eldorado) had the optional 3-way adjustable mirror. The Devilles and Calais models (in 66) had the two way mirror. Im surprised someone who is knowledgable of the 62 models hasnt posted-guess its because of the time of the year.
My guess is Caddydaddy is correct regarding the three way adjustment mirror since your car is an Eldorado. Whether the bluish cast to the mirror is correct or not, maybe someone with an original mirror in their car can tell you.
Best of luck. Wish I had the answer!