Do you have access to the new window? If not ask for exact measurements, plus a lot of those hehr windows from that era are marked with a series and sometimes a part number which is unique to the specific size.
Scott & Megan
WBCCI #8671 Oregon Unit
63 PARTS NEEDED
Tappan range oven (for spare parts)
baby moons for stock rims with clips
twist drawer knobs and their face frame screw in hook