Longines HydroConquest 43mm Green vs Longines HydroConquest 39mm

Both are Longines HydroConquest divers with the same L888.5 automatic movement, 72-hour power reserve, sapphire crystal and 300 m water resistance, so the real decision is size and wrist feel. The 42 mm green-dial version is the bolder pick, with a ceramic bezel and a heavier steel bracelet that suits larger wrists. The 39 mm grey-dial version is the more versatile everyday diver, thinner on the wrist and easier to wear under a cuff. Owners consistently praise the finishing and comfort for the money; the main complaints are the clasp and the weight of the larger case.

• Choose the Longines HydroConquest 42 mm if you have a wrist of roughly 7 inches or more, want a green dial that stands out, and prefer a substantial steel bracelet.
• Choose the Longines HydroConquest 39 mm if you want a smaller, lighter dive watch that fits under a shirt cuff and works with almost any outfit.