Calendar watch day and date advance mechanism - has two cooperating two armed levers and internally toothed wheel

摘要

The day of the week and date indicators are each provided as an annular disc coaxial with the shaft for the watch hands, and are advanced via a mechanism including an element which engages the star wheel, for indexing the day of the week disc, the star wheel driving the toothed inner periphery of a ring secured to the date disc. A two armed lever, has one arm cooperating with the star wheel so as to pivot the lever, this arm then acting against one arm of a further lever which has a second arm engaging the toothed ring to index the date disc, the second pivoting against spring bias.