The cover I need is 4 1/2"long X 1" wide X 3/4" tapering to 5/8" high. It has a hole to accomMidate a 3/16' SHAFT which is centered side to side in the top portion of the cover. There are no screw holes. It does have extension on the ends which slide into slots in the window. I believe this window was install when my house was built in 1974-1975.
I will purchase 3 of these if you can identify it.I have pictures but could not get the add feature to work. If you send instructions I will try again.
Stanley