As a follow-up to the previous post – and a helpful comment, thank you! – I’ve tried slipping the sleeve (cuff, undersleeve, engageante?) into the sleeve of a linen shift. Well, three different shifts. Above is the first. Very nice fit!
The next one, below, is an even better fit.
The last one I tried just for comparison. It’s obviously a wider sleeve, and I have a feeling that the shift was perhaps of an earlier date, and the sleeve was cut off to fit later fashions. And after looking at a few over the years, I wouldn’t be surprised if that was rather common. Although a shift didn’t require as much work as man’s shirt, the tiny stitches worked on fine linen were very tedious to do, and clothing was valuable!