Delma has been an unbiased and family-owned Swiss model since 1924. It launched its first dive watch in 1969, the Periscope, which was adopted by a bona fide skilled diver in 1975, the Shell Star. Delma has been dedicated to each enhancing and increasing its underwater portfolio for many years, and the brand new limited-edition Quattro is a testomony to that. Two strap choices, a number of dial colors and a particular decompression plate that may maintain the watch case elevate this skilled diver above the norm.
The stainless-steel case is on the bigger facet at 44mm in diameter and 15.3mm in peak, however the dimension is right for a professional diver. Water resistance is rated at 500 metres, and there’s a requisite helium escape valve on the left facet. The unidirectional rotating bezel has six outstanding notches as an alternative of conventional knurling, giving it a extra sturdy aesthetic. The diver’s scale is out there in plain metal or black DLC, and all markers are coated with Tremendous-LumiNova C5. The screw-down crown isn’t protected by guards however recessed into the case itself. It may be unscrewed by a supplied instrument or perhaps a coin or by hand when faraway from the watch head (extra on that under). To detach the case, a lever on the left facet at 8 o’clock is pulled up after which turned to 9 o’clock. The other is completed to return it, inserting the case with the lever at 9 o’clock and turning it counterclockwise to eight o’clock. It clicks firmly into place.
The explanation to take away the case from the watch head is to utilise a specialised decompression plate. Often known as the Fast Bracelet Change System (RBES), this bayonet mount is much like altering lenses on an SLR digital camera and could be carried out in all circumstances. The aluminium decompression plate includes a detailed chart beneath the mounted watch case. The tables are based mostly on the analysis of Hannes Keller and Albert Bühlmann and designed for a number of decompression stops with altitude thought-about. There are two units of knowledge on the plate – one for diving within the mountains at 700 meters above sea stage (MASL) or increased and one under 700 MASL. The plate has a spring snap hook and may simply be hooked up to an oxygen tank or different gear. A rubber strap or three-link metal bracelet with a security deployant clasp may also be modified with out instruments by way of Delma’s RBES.
The dial is available in black, blue or orange, and all have the choice of the metal or black DLC bezel. The minute and lollipop seconds arms are orange, whereas the hour hand is white for distinction and separation. All arms have Tremendous-LumiNova inserts, as do the utilized spherical and oval indices. A date window sits at 3 o’clock and is black on the black dial (white on the opposite two). Legibility is superb, as anticipated for a professional diver.
Powering the Delma Quattro restricted version is a Sellita SW200-1 computerized (ETA 2824 various). This Swiss workhorse has 26 jewels, beats at 28,800vph (4Hz) and comes with a 38-hour energy reserve. Capabilities embody central hours, minutes, hacking seconds and date. Though the watch has a 500-metre depth ranking, there’s surprisingly an exhibition caseback. The motion is undecorated however includes a good gold (colored) rotor.
The Delma Quattro is proscribed to 999 items and is available in a customized field to retailer the watch, strap and decompression plate. A particular blue leather-based pouch can also be included. It retails for CHF 1,990, EUR 2,090 or USD 2,390, which isn’t unhealthy in any respect for a professional diver with distinctive options and customized equipment. For extra info, please go to Delma’s web site.