My source in France is certain the bag is c.1700s. Several experts I've consulted also thought it consistent with the materials, stitchery manner and metal thread trim and handle of 18th century, and out only question is of the simple rectangular form, and whether it was made later from earlier remnants of vestments, perhaps. I can see it is entirely hand stitched, the old silk velvet has great age to it and a bit of slight deterioration. I can tell that it had the same silk velvet as a lining at one time, and that has mostly torn away, been torn away, likely deteriorated and perhaps to show how the stitchery looks from the interior. It is quite a splendid sample of very old silk thread embroidery, and the sewing has been worked through the velvet and to a backing of woven raw silk canvas-like broad weave. I've tried to show all details. I think once you have it in hand, you'll also affirm with me and others that it is into 1700s or perhaps even earlier. A stunning textile. It is 8.5" long, plus handle of woven/braided metallic thread, and 7.5" wide.
Very good for age and type. There are no holes, though the dark silk upon which all that stunning embroidery has been worked shows worn spots where you can see the lighter interior silk through a bit. A few shred spots. Two worked panels make up the bag, perhaps it was part of an ecclesiastical garment, and there is a tiny even loop trim around the perimeter which is metallic threads, as well as the handle and tassels. Tassels are a bit rough, as you can see. Age in consideration, a museum piece more than a bag to be used, please.