Confused - how to read this Chronoscope dial

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I've got the 3 most outer scales down (tachymetre on bezel, telemetre & pulsametre on dial), but the 2 inner concentric scales confound me. Please enlighten me.
 
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IIRC, those are 2 and 3 minute dials Tachymetres. So 1 minute is '60' X-per-hr, 2 mins is 30, 3 mins is 20. So they are just extensions of the bezel.
 
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IIRC, those are 2 and 3 minute dials Tachymetres. So 1 minute is '60' X-per-hr, 2 mins is 30, 3 mins is 20. So they are just extensions of the bezel.
Got it.. Thanks!
 
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This watch is beautiful. Love these old chrono designs with several scales in the center.