I learned today that older pochettes do not have a ring on one end for the strap to attach to. I don't know when that design changed (if anyone does, please let me know!), but the newer ones are different. I also know that very old Speedys had a seam on the bottom and were made with separate pieces of canvas and the monograms on one side were not upside down. Does anyone know when that design changed, and does anyone know of any other design changes on any bags?