Help identifying window frame with hinge pin holes Can anyone identify this piece (picture below)?

It looks like the top half of a window frame with some 2 pin holes in it.

The size is 1 x 6 x 4, it has no model number on it but does have LEGO branding on the studs.
That would be 821 Garage Door Frame (Old style).

As the name implies, it was for the old garage door in these sets from the 50s and 60s.