Longines HydroConquest 43mm Green vs Longines HydroConquest 39mm Blue

Both are Longines HydroConquest divers with the same L888 automatic movement, 72-hour power reserve, sapphire crystal, ceramic bezel and 300 m water resistance. The real split is size and dial: the L3.788 is a larger green-dial watch, the L3.780 is a 39 mm sunray blue diver that suits smaller wrists and dressier wear. Owners of the line praise the finishing and comfort for the money; the 39 mm version is the safer everyday pick, the green one the bolder statement.

• Choose the Longines HydroConquest green-dial if you want a larger, bolder dive watch with a green dial and a ceramic bezel that stands out on the wrist.
• Choose the Longines HydroConquest 39 mm blue-dial if you have a smaller wrist or want a versatile sunray blue diver that slips under a cuff.