Technical Perspective: The Split–Seconds Caliber 79230 And The Original IWC Doppelchronograph Pilot’s Watch The Valjoux 7750 has led many lives. Here’s one that made history. Continue reading ‘Technical Perspective: The Split–Seconds Caliber 79230 And The Original IWC Doppelchronograph Pilot’s Watch’ 0 Posted In: Uncategorized