The latest Ronstan RF4054 40mm ClearStart watches have a new design with new materials and performance improvements.
The watches also incorporate familiar timing features and functionality.
They complement the recently released 50mm models to cater to youth sailors, those with slimmer wrists or sailors preferring a more compact option.
Features of the new design include a clear, hardened and scratch resistant mineral crystal lens, recessed for extra protection and a glass-reinforced case with a stainless-steel structural tension ring around the lens.
The watches also have a soft-feel, injection-moulded silicon band for added resilience, flexibility and comfort.
Buttons act on precision machined stainless push-rods, sealed with triple gaskets to prevent moisture entry.
The watches are available in three colours.