When pressed to think of dive watches from the 1960s, your mind will often go to the known brands. Rolex, say, or their daughter brand Tudor, whose Submariner or sets the standard for what a dive watch is supposed to be. Or Blancpain, who arguably created the whole subgenre with their Jacques Cousteau-approved . Then there's always Seiko, whose saw service in the Vietnam War. But in terms of vintage divers, that's merely scratching the surface.

Nicolet is a brand that might not get a lot of recognition, but has a pedigree that's just as respectable as the horological heavy hitters mentioned above. Armand Nicolet opened his manufacture in the Jura Mountains in 1875. Nicolet, the son of a watchmaker, established a reputation for producing fine pocket watches with guilloché cases. After Armand's death in 1939, his son Willy succeed him as head of the atelier. 

It was under Willy's leadership that the manufacture's production expanded to encompass the production of wristwatches. His divers produced in the 1960s rate among some of the most visually-appealing of the period. The technical innovation of their construction rivals even that of Rolex and Doxa. 

The Skin Diver 900 that we have here dates from the mid-1960s. Aesthetically, the Skin Diver resembles divers produced by or , with a chunky 40mm case and a Bakelite bezel--here a vibrant cherry red. But its warm silver dial is a true standout, softening its looks considerably. 

But the most salient feature of this piece is the Helium Release Valve, not necessarily the fact that it has one, but its location. Unlike Rolex and Doxa, who placed the Helium Release Valve in the side of the case (in their and divers), Nicolet placed the valve in the screw-down crown. This unusual placement, ostensibly to make it easier for the wearer to use, is a truly utilitarian design feature, not to mention a technical triumph.

Inside beats an A. Schild Caliber 1748 automatic movement. The Caliber 1748 is a no-nonsense caliber that enjoyed its heyday in the 1960s before Schild ceased production in the 1970s. It features a ball-bearing rotor that's an absolute joy to hear when in action. 

With attractive looks and a solid construction, the Nicolet Skin Diver 900 is a sporty alternative for the collector who desires an unusual and rarely-found diver.