Timepiece

Abstract

A timepiece enables knowing the cumulative drive time indicating how long the timepiece was actually operating. The timepiece 10 has a movement 20, hands disposed to the time display wheel train of the movement 20 for indicating the time, and a month display ring 41 and year display ring 51 that are connected to the movement 20 and count how long the drive source has been driving inside a case. The movement 20 includes a movement barrel 30 housing a spring as the power source, a time display wheel train linked to rotation of the movement barrel 30, and a cumulative drive time display mechanism that operates in conjunction with rotation of and transfers torque from the movement barrel 30. The case includes at least a crystal, a casing 11, and a back cover 12. Part of the back cover 12 is transparent to enable viewing the month display ring 41 and year display ring 51.

Dependencies are inferred from the claim text.