Does anyone know how the various mechanical complications rank in difficulty to produce? I don't mean combinations of complications, but single complications. Based on a some comparisons across brands and within brands, it seems like they rank something like this from highest to lowest:
Minute Repeater / Sonnerie
Extended Power Reserve with Indicator
Of course, there are certain variations of the above that change the pricing a bit, like rattrapante chronographs, quarter repeaters, annual calendars, multi-axis tourbillons, etc. Also, exactly how well the movement was made and cased will have a far greater impact on the cost than the complication itself, making comparisons tricky. What other distinct complications have I missed, or is my list misordered? My rationale for ordering them that way is as follows:
1. Minute Repeaters always seem to be priced higher than Tourbillons, whether made by the Swiss or Chinese. They are also far more complicated in mechanism.
2. While there are only a couple Chinese perpetual calendars, and they cost more than basic tourbillons, Swiss perpetual calendars seem to be priced lower than Swiss tourbillons in many examples.
3. Mechanical chronographs are fairly common in the lower price ranges, but not mechanical alarms. I read somewhere that one of Poljot's stated reasons for discontinuing their mechanical alarms was that they cost more than the chronographs to produce, yet had less demand.
4. Power reserve is a little tricky, since there aren't many out there with 8-day or longer reserves, and this requires more work than just using a bigger mainspring. It seems that they may be a little easier to do than a chrono finished to the same level, though.