Inside, and hinted by the “HW” in the reference’s name, the Type 37HW uses a hand-wound Selitta SW216-1 in a true no-date layout that ticks at 4 Hz, has a power reserve of 42 hours, and is COSC certified for accuracy. For those curious, there is no phantom date position, and the crown is designed to avoid engaging with the movement when it’s being screwed down. Covered by the solid caseback, the movement offers hours and minutes along with a small seconds display at six o’clock. While certainly not an especially high-end movement, it is offered in a chronometer spec and was selected because it offered the correct mix of performance, reliability, and ease of service.