To my knowledge there are no preserved French baroque viola da gamba bows known. Many bow makers made a guess how they could have been. I based my guess on a painting of Marin Marais from Andre Bouys, dated 1704, from the Musée de la Musique in Paris and a print that is available from different sources.
Over the years I made several copies of this bow, with slight differences in weight and with two different frog fixations.
Most players preferred the clip-in frog, which seems the most logical solution.