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Old powermeter isn't it?
No. It's a crank (RS3 or RS4) with a weird system of cams and links which vary the phase angle of the crank relative to the chainring as the crank rotates, providing the variable gearing effect they later implemented more simply with oval rings.
http://bikemagic.com/bike-components/rotor-cranks.html
https://www.youtube.com/watch?v=qwLLpd5c1M8
gbj_tester
@umop3pisdn
Old powermeter isn't it?