Concept2 Indoor Rower PM3 Monitor Rear Case Back *SERIAL No. STARTS WITH 3 or 4*

This is the case back for the Concept2 rowing machine PM3 monitor. It is ONLY for PM3 monitors with a serial number that begins with a 3 or 4. However, I believe that it can be used with PM3 monitors with serial numbers beginning 1 or 2, but ONLY if a log card is never used with the monitor.

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