Ca. 1990 Pella, beige aluminum exterior, clear finished (or a very light stain) pine interior, casement window. These old Pella windows have are single pane with a second, clip in pane, for the inside, which is included. It is not a thermopane, or insulated, glass unit. The window looks pretty clean, but it is 33 years old, which is reflected in the price. Great window for a shed or studio space.