Vintage Watch | Citizen Seven Star Parawater APSS-2812-Y

Vintage Citizen Seven Star Parawater APSS-2812-Y: Legendary 1968 100m Compressor-Style Japanese Diver (Just Serviced)

Step into the golden age of Japanese dive watches with this exceptional Vintage Citizen Seven Star Parawater APSS-2812-Y. Produced in 1968, this rare JDM tool watch captures Citizen’s pioneering spirit in underwater horology. As part of the premium Seven Star lineup under the iconic “Parawater” designation, it stands as one of Citizen’s earliest professional divers — a robust, super-compressor-inspired piece that helped establish Japan’s reputation for serious dive instruments long before the quartz revolution.

Pioneering Parawater Legacy Citizen introduced the Parawater name in 1959 as Japan’s first true waterproof wristwatch, a milestone that proved the brand’s engineering prowess through real-world ocean and trans-Pacific testing. By 1968, the Seven Star Parawater series elevated this heritage into proper dive territory. The APSS-2812-Y (also referenced as 2812-Y) features a distinctive dual-crown compressor-style layout with an internal bidirectional rotating bezel, delivering 100 meters of water resistance in an era when most watches were still struggling with basic splash protection. It shares DNA with early Citizen divers but stands out with its substantial presence and functional day-date complication — a true workhorse built for adventurers and collectors who appreciate authentic 1960s Japanese dive-tool authenticity.

Key Features and Design

• Cushion Compressor Case: Massive yet wearable 43-44mm stainless steel case (approximately 50mm lug-to-lug, 11-12.5mm thick) with bold brushed lugs and a commanding wrist presence. Dual non-screw-down crowns (one at the standard position, the other at 2 o’clock operating the internal dive timer bezel) create a unique pinched crown-guard profile that echoes Swiss super-compressor designs while remaining distinctly Citizen.
• Matte Black Dial with Patina: Bold trapezoidal applied markers, Mercedes-style hour hand, and lumed lollipop seconds hand deliver outstanding underwater legibility. The day-date window at 3 o’clock adds everyday practicality, while the “Seven Star” logo and “Parawater 100m” marking underscore its heritage status. Many examples develop a beautiful warm patina that enhances character without compromising readability.
• Caliber 5270 Automatic Movement: 21 jewels, 18,000 bph, hand-windable, with quick-set day and date functions. This reliable workhorse was engineered for durability and continues to deliver solid performance even after decades — the perfect companion for daily wear or display.
• Original Acrylic Crystal: Tall, angled design that protects the dial and maintains that authentic vintage dive-watch look. There are some honest usage mark on the crystal that developed inside the Crystal. It is not a crack but just again from the acrylic. Therefore we decided to keep the crystal as original.

This watch embodies the rugged charm of late-1960s Japanese tool watches — practical enough for real adventure, striking enough to turn heads today. Its substantial size and slim profile make it surprisingly comfortable despite the commanding dimensions, slipping under a cuff or pairing perfectly with casual or explorer-style outfits.

A Collector’s Smart Choice For enthusiasts seeking a genuine vintage Japanese diver with super-compressor flair, impressive size, and direct ties to Citizen’s Parawater pioneering era, the APSS-2812-Y is a standout. Far less common than later Seiko models yet more accessible than Swiss contemporaries, it offers outstanding value and historical significance. Whether you’re building a Japanese dive collection or simply want a bold, character-filled daily wearer with 100m capability, this 1968 Seven Star Parawater delivers timeless appeal that will only grow in desirability.

Specifications:

Maker: Citizen

Model: Seven Star Parawater APSS-2812-Y

Era: ~1968

Case Diameter: 43-44 mm

Lug to Lug: ~49 mm

Lug Width: 20 mm

Case Condition: In good vintage condition with sharp original brushed finishes, the watch dont have a lot of usage mark considering its tool watch nature.

Dial Condition: Striking black dial with attractive patina and bold lume

Movement: Cal. 5270 automatic, 21 jewels, 18,000 bph with day-date complication just serviced by our watch maker in Japan

Crystal: Original acrylic. There are some honest usage mark on the crystal that developed inside the Crystal. It is not a crack but just again from the acrylic. Therefore we decided to keep the crystal as original.

Of course, it comes with a vintage steel aftermarket bracelet. You can also choose to pair up with our premium leather or NATO straps with our promote code to perfectly complement its rugged dive heritage. Just let us know your preference!