The specs line up: GMA-P2110B-1A in monochrome black, GMA-P2110B-5A in an earthy all-brown finish, both watches built around the compact octagonal case, that is G-Shock's signature design since the GA-2100. The slim metal ring insert and logo-free bezel carry over from that base line, along with sharper, more defined bar indexes than the larger GMA-P2100 series uses. Both bezel and band use bio-based resin, part of Casio's broader push toward renewable materials across the G-Shock line. Meanwhile, you can check out the Casio G-Shock GMAS2100-1A on Amazon. Source(s) Casio International (1) (2)