A 5600 series model that incorporates a carbon core guard structure that allows the band and bezel to be switched out. Use of lightweight and highly rigid carbon fibre reinforced resin for the case material allows the band and bezel to be removed and replaced. This is achieved via a mechanism that secures the bezel to a slide-lever type band using inner hooks, without the need for screws. The SHOCK RESIST logo is located on the inner case so that it can be seen only when the bezel is removed.