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The ABCs (Altimeter, Barometer, Compass) of Casio Produce a Truly Useful and Stylish Pro Trek Watch! | GearDiary
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ProTrek PRTB50 Altimeter | Combine the PRT-B50's time and altimeter reading to monitor your progress through the climb. http://bit.ly/ProTrekPRTB50-1 | By Casio PRO TREK | Facebook
The ABCs (Altimeter, Barometer, Compass) of Casio Produce a Truly Useful and Stylish Pro Trek Watch! | GearDiary
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