jamiesummer04

I've had a pair of wing windows for over 20 years. I need help identify where they came from. Digital technology is a bit outta my leage. Any info would be appreciated. The glass is clear, bevelled and approx 22-24"tall x 12-14"wide. It has metal brackets with a vertical bar down the center. A knob/wing nut on the bar have words "sewell" and "patented" stamped on opposite sides. ?Any ideas