This also reminds me of the X-WIND by Hamilton and the PRS 516 Extreme. Infact the PRS 516 family has many watch that look like this.
The X-WIND isn't just a crono though it does all sorts of calculations for air travel.
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Dmanjapan
Aug 6, 2020
jerick70True Valjoux for almost half the price. Similar and cooler strap.