Used grade "B" quarter window channel / frame for the driver side (left hand) of the Mercury Cougar. This unit is pit free on the exterior, but will show the beginnings of some small pitting on the interior. The chrome will also most likely be discolored from being exposed to the elements for 45 plus years. There is an upper quarter window channel / frame that screws to the lower portion, but it is made from stainless steel and rarely needs replacing. However, if you need one, mention it in the comments and we will throw one in with your order for free!
Ford part # C7WY-6529959-A, casting # C7WB-6529945-A.
*NOTE* This is just the frame and does not include the quarter window glass.