I am a student bookbinding and am always looking for supplies. Asked clerk if he had linen thread and he sold me one each of nice colors. I did run through beeswax and used white on sewing miniature book.
Used various colors of this linen thread to buttonhole-stitch over contemporary fastenings. Very pleased with the quality of the thread. Hoping it comes in larger spools in the future.
If a repair is needed on historical items, it is best to be authentic all the way Strong thread with a great feel