I recently added these two bags to my collection. They both seem to be the convertible clutch but the strap and hardware are completely different! Even the interior zipper pulls are different. Im very intrigued now. Does anyone know when Coach altered the strap style? Im guessing the blue bag is older but neither has the glued on registration number, both are just embossed NYC bags. If anyone has any info Id love to know more about them. Thank you!