"Hi Florence, I was going to suggest looking at Hedebo. Someone else may be able to provide you with a name.
Looking at the photo close up, it could possibly be worked in two stages, from the outside in. A buttonhole stitch that has been worked into…"
I have been crocheting since a young child, learnt tatting as a teenager, introduced to bobbin lace in my 20's & needlelace in my 40's. My favourites are those done with a needle, especially reticella, drawn thread, & tenneriffe lace. Bedfordshire is my favourite of the bobbin laces, which I am trying to teach myself.