The “JDD Yamam” is a limited production large dive watch that displays the date and day of the week in English or Hebrew. Designed for use by Search and Rescue (SAR) divers, the Large Bilingual Diver’s Automatic is a watch built to withstand the most extreme of conditions. The watch is also known as the Jumbo Day Date (JDD) and is certified for water resistance to 30 ATM – 300 meters (1000 feet) underwater.
Made from 316L surgical grade stainless steel, the JDD is a hefty, purpose-built watch that will not let you down. The domed shape of the scratch-resistant sapphire crystal improves dial legibility.
The JDD is made in La Chaux de Fonds Switzerland to guarantee the highest level of manufacturing quality and accuracy. Inside the JDD is a Swiss made, 26 jewel Sellita SW-220 automatic movement that guarantees you a reliable and accurate timekeeping experience.
The JDD Yamam is the same size as Marathon’s popular JSAR watch. Due to the expansive dial space, Marathon designed the numbers to be very large to increase the already great visibility and they put the supplemental (military) numbers 13-24 on the inside bezel ring. The sapphire crystal of the JDD will resist scratches, and is coated with an anti-reflective coating to ensure maximum dial legibility — and it is domed shaped to improve legibility even further.
The JDD uses self-contained tritium gas tubes to ensure constant visibility in low light situations. A tritium gas tube is placed on each hour marker and on all hands. MaraGlo paint is used for the 12 hour bezel marker. Tritium tubes are self-illuminating gas tubes which contain an isotope of hydrogen, meaning they will not dull down in brightness like normal photo-luminescent paint which requires an external light source to create a glow.
The JDD combines military toughness with Swiss craftsmanship in a watch that will get the job done, and look good doing it.
JDD Yamam Specifications:
- MIL-SPEC: Manufactured in accordance with Israeli Government
- TRITIUM GAS TUBES: Self-illuminated 24/7 tritium gas tubes for up to 25 years.
- SEARCH & RESCUE: Designed for Search And Rescue missions.
- SWISS MADE: Proudly handmade in La Chaux de Fonds, Switzerland since 1939. Uses Sellita SW-220 26 jewels automatic mechanical self-winding movement.
- DAY/DATE: Features large, easy-to-read Day & Date display is shown in either English or Hebrew.
The ultimate large size current special purpose dive watch!
The Yamam (Hebrew: ימ”מ, an acronym for Special Police Unit (יחידה מרכזית מיוחדת, Yeḥida Merkazit Meyuḥedet)) is an Israeli counter-terrorism unit, one of four special units of the Israel Border Police. The Yamam is capable of both hostage-rescue operations and offensive take-over raids against targets in civilian areas. Besides military duties, it also performs SWAT duties and undercover police work.