Materials: Dress watches are very often offered in precious metals, but this isn’t exclusively the case — no one in his or her right mind is going to knock a steel-cased Calatrava worn with a tuxedo, for example. Buy something that compliments what you wear when you’re at your dressiest.Water Resistance: Dress watches typically don’t boast a ton of water resistance — think 30m or 50m — due to their remit, which doesn’t generally include diving, driving, shooting, skiing, and mine-laying, unless one’s last name is Bond and one has a license to kill.Bezels: Dress watches often have a fixed, polished bezel for simplicity’s sake — there’s no need to time laps, measure decompression stops, etc when in black tie. (Again, unless you’re James Bond.)Hands: If you don’t see a second hand on your dress watch, don’t panic! There’s no need for one. Admittedly, this can make it more difficult to tell if your watch is running, but not to worry — just hold it up to your ear to see if it’s ticking, either mechanically or quartz-ily.Lume: There’s a healthy chance your dress watch might not be lumed, or it might not be lumed to the degree that your dive watch is. This really depends on the make and model of the watch, but don’t expect lume on something like a vintage Patek Philippe Calatrava reference 96, for example. Thickness: A dress watch is meant to be thin to fit under a cuff, and to that end many feature either hand-wound movements — which are thinner than their automatic counterparts — or quartz movements. Some specialist, ultra-thin automatic dress watches do exist, however. Diameter: We recommend keeping dress watch diameter small such that the watch doesn’t interfere too much with your cuffs, but there are plenty of 40+mm dress watches, even from the likes of top-tier makes such as Vacheron Constantin. Straps: Again, most dress watches tend to feature fine leather two-piece straps, though there are exceptions — especially those on fine, precious-metal bracelets. Many leather dress straps are either reptilian or reptilian-lookalike, though if this doesn’t agree with you, there are calf-leather options or vegan options.