accurate quartz-crystal watch ever made. They are currently sold only in the Japanese domestic market but can be obtained internationally if ordered online. Contemporary watches Citizen also produces the Independent Watches line, featuring a more modern, contemporary design than the traditional Citizen label. Depending on the market, these watches may be labelled "Secret", "Lighthouse" brands among others. DCP clasp The deployant clasp with a Push Button (DCP) is a clasp available for many Citizen watch bracelet bands. The clasp, as with the Calibre 8700, is also used with leather bands as if they were metal bracelet-style watchbands; however, when the clasp is fastened, the band appears to be a normal eye-hole and link pin leather watchband. Diving watches (including the Fugu) In 1959, Citizen launched the Parawater – Japan's first fully-waterproof wristwatch. It became the forerunner to Citizen's range of dive watches, subsequently (1982) called the Promaster Marine range. Also in 1982, Citizen launched the 1300m Professional Diver's watch – the world's most pressure-resistant wristwatch at the time. But it was perhaps the Fugu that became Citizen's most iconic diver. With its launch in 1989, fans nicknamed it the Fugu, after the Japanese pufferfish. The watch's bezel has alternating smooth and serrated edges to provide a positive grip in wet conditions, with the shape inspired by the pufferfish. Citizen eventually adopted Fugu as the watch's official name, even engraving some models' casebacks with a pufferfish logo. And in 1993, the Comando Raggruppamento Subacquei e Incursori Teseo Tesei adopted the Fugu NY004 for official use. All Fugu models are certified to the ISO 6425 standard for reliability underwater, resistance to shocks and magnetism, water-tightness and thermal-shock resistance. The original Fugu series (NY004, NY008 and NY009) were criticised for their bezel action and lack of sapphire crystal. These issues were ultimately addressed by the NY011 series (launched in 2020). With a Miyota 8203 movement, Fugu automatic watches can be handwound – a significant advantage over their original competitor (Seiko's now discontinued SKX). Among the world’s ISO-certified watches for professional diving, the Fugu remains the mechanical watch in continuous production for the longest. Eco-Drive Eco-Drive watches use a battery recharged by a solar panel hidden under the watch face. In the rare and discontinued Eco-Drive Duo series, the solar power was supplemented by an automatic quartz power source. One early model, called the Citizen Vitality, used the watch hands to drive a small