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Discussion Starter · #1 · (Edited)
I had a devil of a time finding information about this watch, and answers to it's function, until I came across a reference that provided my watch contained the caliber ETA 205.911 movement. Then all was revealed! Most importantly, confirmed is similar to Seiko Kinetic Direct Drive, in which turning the crown to "wind" the watch, actually turns the generator to provide charging current to the accumulator (a rechargeable Li-ion battery) which then drives the quartz movement.

Below are some links I hope other Tissot PRC 100 watch owners will find interesting/helpful:

The specific watch: T-Sport PRC 100 (Model T22.1.589.41)
http://www.fineclock.com/en/tissot-t-sport-prc-100-t22-1-589-41~63-p19087/

Description of the movement.
http://www.kinetic.net/docs/eta.html

Complete details of assembly, disassembly, principles, and tools.
http://www.eta.ch/swisslab/205911/205911.html
 
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