[MRM]

If you haven’t had too much of a history lesson, that slight curve you mentioned is hard to do. It must have been custom built for its opening back in the day when all windows were made for the house and before there were standard sizes. They would have been expensive for their time and must have been in a very nice house. That’s why they’ve been kept for so long. They’ll look great in your wife’s project once you get them cleaned up.