Casio PRG 270 - module 3415 - review and a detailed tutorial on how to setup and use all functions - YouTube
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How to set time on Casio ProTrek PRG-270
MANUAL | PRO TREK - Mens Watches - CASIO
User manual Casio Pro Trek PRG-270-1ER (English - 14 pages)
ProTrek PRG-270 User Manual / Casio Module 3415
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