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NASA requested a stainless steel bracelet for watches in their space program, sold as the 'KOMFIT' model by FORESTNER. Later taken over by JB Champion USA, featured a spring-loaded curved end link exp

SEIKO SCUBA DIVER 7S26-0020 AUTOMATIC DIVER (SKX-009J1) designed as a CHEAP TOOL watch, meant for use and abuse, available for around $125 brand new.

The article discusses the Super-Compressor case sealing method used in watches, specifically Hamilton calibre 64A. Developed by Ervin Piquerez S.A., the design utilizes water pressure to enhance the s

1973 Tissot Automatic Navigator 2160 with Lemania caliber 1343 60 min chronograph. OMEGA-TISSOT-LEMANIA group. Late 60's, 70's Tissot had hand-wound (Lemania 873, Valjoux 7733/34) and automatic (Leman

The Citizen 62-6198 Challenge 150M Diver dial type-1 was among Citizen's first dive watches in 1969, marketed worldwide. It features a large crown, red date wheel, and lume plot next to the date windo

The article discusses the rare 1977 CITIZEN 52-0110 Challenge 150M Diver watch with a unique dial type 1, showcasing how Citizen used a distinctive manufacturing process. A barnacle-covered example fo

The SIDUNA M-3440-051010 Bi-Compax SELFWINDING Chronograph is a modern interpretation of a vintage EPSA case #817 military-issued Lemania Chronograph. With design features reminiscent of classic brand

SEIKO 6105-8110/9 is a second 150m dive watch with an asymmetrical case design, produced by Seiko from 1968-1977.

SEIKO SBDY005 JDM is a limited edition watch designed for night diving, inspired by ocean bioluminescence. Features 45mm black PVD coated case, Lumibrite hands, and index, purchased in Japan in 2018.

SEIKO 7002-7009 A1 SCUBA DIVERS were US NAVY SEALs' issued watches. SEIKO CALIBER 7002A with 17 jewels replaced 6309 in late 1980s until 1996 introduction of 7S26.

SEIKO 6309-7049, known as TURTLE, was a popular Seiko dive watch from 1976-1988. Special editions like the 6306-7000/1 JDM were made for the U.S. Market.

The Seiko 6309-729A F1, also known as the Slim Turtle, was produced on December 15, 1982, with a unique Pepsi bezel. This model belonged to the second generation of 6309 divers, featuring a slimmed-do

The 1964 Omega Seamaster 600, Ref#: 136.011 (epsa), came in 4 dial versions, with Caliber 611 manual wind movement.