Of course, I'm a hand quilter so would finish it with hand quilting. Because your great-grandmother made this top, hand quilting would have been her choice or only option for finishing. No long arming at that time. I would finish it as she would have done it. I have quilted several old tops and, as I'm working on that, it's enjoyable to see the fabrics and techniques of the one who made it. I think perhaps that person is smiling as the work is being completed.