Technically the second flap is 2 prevent losing the watch. Both 3 and 5 ring allow for a springbar or welded bar to break. The 2nd flap is insurance in case the top strap breaks in the weak spot if the watch was caught on something. The weak spot is at the first keeper. Or so the rumor is. I don’t see how it keeps it in place better as one of my favorite watch/strap combos is a custom leather 3 ring Zulu with my SKX.
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