The latest from Nixon's military-geared “The Rover” release are these tonal grey-on-grey models based on the 51-30. Deemed the “Rubber” and the “Tide”, the former features a solid rubber construction, metal hardware and hits of contrasting orange hues. As for the “Tide”, its unique gunmetal construction is complemented by a muted grey face with hints of orange on the hands and notches. Available through select Nixon timepiece stockists as well as directly through the Nixon online store.