oops...I crossed my eyes when I looked up the interior code. It is Sandalwood. Nutmeg is pretty much a brown color.
I couldn't take it anymore...been wanting to do this since I opened the site in January of 2005. A new discussion board dedicated to the Centurion! http://www.buickcenturion.com/forums/index.php
After a week-long hiccup, the forums are working again. I upgraded the vbulletin software to the latest version, and in the process, grenaded all image attachments and avatars. Nothing EVER goes smoothly with software upgrades, it seems.
My 72 formal coupe has a Dk green vinyl interior I dont have my car with me at the moment so I cant verify the numbers for it but the car has been in my famly since 72 so I believe it is stock.
I don't believe there was any restriction on interior colors for the Formal Coupes. Mine was black, so I know they were available in more than Sandalwood.