Guitartec I don't own this watch, but I know watches. The small dials appear to function. The right subdial looks to indicate calender day. The center subdial is a 24hr. AM/PM indicator. The right subdial is a 7 day indicator- it advances 1 full day every full rotation of the AM/PM indicator.... (sorta useless IMHO!). The pushers (the 2 buttons) look like they set the subdial hands, not start & stop a timer of some sort like a typical Swiss watch, but that's okay I guess. The heading says Automatic Mechanical which means " it winds by the movement of your wrist" and if you don't wear it for a day or 2 and it stops ticking, you'll need to reset all the hands, which can be a pain in the ars.