As mentioned above, this Longines Spirit Zulu Time 39mm uses https://is.gd/8fxu2M link Longines' ETA-derived L844.4 automatic movement. The movement has hacking, hand winding, date quickset, local-jumping GMT, a silicon balance spring, and https://tinyurl.com/y8azuncw link is COSC-certified for chronometer timekeeping. In my testing, over six positions, this loaner https://v.gd/lb4K5b link from Longines averaged +5 seconds a day.

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