

Lugs stay on wrists from about 6.25 in (lug-to-lug rule of thumb)
Last checked Oct 26, 2026
View on Formex’s site ↗@media (max-width:768px){.read-more-zeno{border-bottom:1px solid #dbdbdb;position:absolute;font-weight:700!important;z-index:9;cursor:pointer;font-size:16px!important;color:#363636!important;font-family:Muli,sans-serif!important;text-decoration:none!important;width:100%;background-color:#fff;padding:10px 0!important}.custom-text{overflow:hidden;display:-webkit-box!important;-webkit-line-clamp:12;-webkit-box-orient:vertical;text-overflow:ellipsis;padding-bottom:0!important;padding-top:2rem!important}.custom-text::after{content:"";position:absolute;bottom:0;left:0;right:0;height:50px;background:linear-gradient(to bottom,rgba(255,255,255,0),#fff)}}function decriptionHeadingClick(){$(".description-text-zeno").removeClass("custom-text"),$(".read-more-zeno").css("display","none")}.slick-list .text-center{color:#6a6a6a!important}.description-inside-accordian .zn-title{font-weight:400;font-size:14px!important;line-height:16px;font-family:Ubuntu,sans-serif!important;color:#2f4f4f!important;letter-spacing:1.2px}.description-inside-accordian .zn-text{line-height:1.5!important;font-family:Ubuntu,sans-serif!important;font-weight:300!important;font-size:13px!important}.description-icons{display:flex!important;align-items:baseline!important}.zenoTab-active{border-bottom:1px solid #222!important}.zenoTab-active .zn-button-text{font-weight:400;color:#000!important}var sectionDescription;function scrollToSection(e){$(".zenoTab-active").removeClass("zenoTab-active"),$(event.target).parent().parent().addClass("zenoTab-active"),e.includes("description")?$(".section-description").html(sectionDescription):$(".section-description").html($("."+e).html())}setTimeout(()=>{sectionDescription=$(".section-description").html()},100)DESCRIPTIONTECHNICAL SPECIFICATIONCLASPABOUT THIS WATCHThe Reef 39.5 mm with its “Bahama Blue” dial is the ultimate summer divers’ watch with exchangeable ceramic bezels and a patented fine adjustment system for a perfect fit in heat and humidity! Our experts in the Swiss Jura mountains achieve the dial's deep, lustrous shine by applying colored lacquer on a mirror-polished surface, followed by seven coats of transparent lacquer, which are then polished down. This is evident in the 6 o’clock date window, a hallmark of all Formex watches. Completing the summer look, the color-matched ceramic bezel is polished with diamond paste, with numerals and hour markers hand-filled with black resin for optimal legibility. The 120-click unidirectional bezel can be removed and swapped by hand with one of four existing options from the Reef 39.5 mm collection. The “Bahama Blue” is powered by a COSC-certified Sellita SW300-1 with 56 hours of power reserve. Our unique gradual fine-adjustment systems in all strap and bracelet options noticeably enhance wearing comfort on the wrist throughout the day, especially during the summer months.Read MoreFEATURESSwiss Made Automatic MovementAn Automatic, also called self-winding watch, is a mechanical watch in which the mainspring is wound automatically as a result of the natural motion of the wearer's arm, to provide energy to run the watch, making manual winding unnecessary. All our Automatic movements are manufactured in Switzerland.Unidirectional Rotating BezelFound in diving watches, the unidirectional rotating bezel is a unique feature that helps measure diving time in a handy and effective manner. The bezel can only rotate in a counter-clockwise direction, which ensures diver's safety even in the case of any accidental manipulation underwater.Screw-Down CrownA screw-down crown is a threaded winding crown that screws tightly into the case and prevents water and dust from entering. Screw-down crowns are commonly used in Diver’s watches, as they prevent from accidentally pushing open the crown, causing possible water damage.Sapphire CrystalA sapphire crystal or “glass” is a very hard, transparent material made of crystallizing pure aluminium oxide at extremely high temperatures. Sapphire is one of the h
Details and photos come from Formex’s website, last checked Oct 26, 2026. Specs were read automatically and may contain mistakes.
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