Seiko Presage Cocktail Time 'Blue Moon' Open Heart Ref. SSA405J1 (or SSA405)
Dress Watch / Complications Watch · Seiko (Seiko Group). Positioned in the 'Presage' line, which represents Seiko's entry-level luxury mechanical watch tier.
Period: Modern Luxury (2010s-Present) with Mid-Century influence. The design is inspired by the glamour of cocktail lounges and the vintage aesthetic of the 1960s.
Type
Dress Watch / Complications Watch
Brand
Seiko (Seiko Group). Positioned in the 'Presage' line, which represents Seiko's entry-level luxury mechanical watch tier.
Movement
Automatic/Self-winding Caliber 4R39; 21,600 vph (3Hz); ~41-hour power reserve; 24 jewels; features hacking and hand-winding.
Dimensions
40.5mm diameter; 12.8mm thickness; 47.5mm lug-to-lug; 20mm lug width. Wears slightly larger due to the thin bezel and expansive dial.
Description
The Seiko Presage 'Blue Moon' Open Heart is a masterclass in dial finishing at an accessible price point. Part of the iconic Cocktail Time series, its dial captures the reflection of a drink in a dimly lit bar. The 'Open Heart' prevents the dial from being static, offering a glimpse into the mechanical heartbeat (the balance wheel) of the watch.
Key Features
Radial pressed dial pattern; 'Open Heart' aperture; 24-hour indicator; box-shaped crystal; signature tapered indices that resemble cocktail glass stems.
Dial Description
Deep blue sunburst dial with 'Blue Moon' cocktail inspiration; features a pressed radial pattern, applied faceted dagger indices, dauphine-style hands, an 'Open Heart' escapement window at 9 o'clock, and a 24-hour subdial at 11 o'clock.
Case Material
316L Stainless Steel with a high-polished finish on the bezel and lugs.
Crystal Type
Box-shaped Hardlex (Seiko's proprietary mineral glass), providing a vintage acrylic-like distortion at the edges.
Bezel Details
Fixed, polished stainless steel thin-profile bezel.
Crown & Pushers
Oversized 'conical' push-pull crown for easy winding, featuring the Seiko 'S' engraving.
Bracelet or Strap
Five-link stainless steel 'beads of rice' style bracelet with a butterfly deployment clasp and dual push-button release.
Caseback Details
Exhibition screw-down caseback with a gold-tone rotor and 'Made in Japan' or 'Movement Japan' engravings depending on the specific market batch.
Movement Type
Automatic/Self-winding Caliber 4R39; 21,600 vph (3Hz); ~41-hour power reserve; 24 jewels; features hacking and hand-winding.
Water Resistance
50 Meters (5 ATM). Suitable for light splashes and rain; not recommended for swimming, showering, or diving.
Origin & Provenance
Japanese-made; manufactured by Seiko's watchmaking facilities in Japan. Uses an in-house 4R series movement.
Age Estimate
Modern production (circa 2020-present). The SSA reference series is the contemporary iteration of the 2010 'Cocktail Time' concept.
Cultural Significance
The Presage Cocktail Time is credited with revitalizing interest in affordable mechanical dress watches among younger collectors, proving that high-end dial aesthetics aren't exclusive to Swiss haute horlogerie.
Condition Notes
Based on the image, the watch appears in Excellent to Mint condition. Sharp edges, clear crystal, and no visible scratches on the polished surfaces.
Value Estimate
MSRP approximately $525 - $550; secondary market value typically ranges from $350 to $450 depending on condition and accessories.
Care & Maintenance
Service every 3-5 years; keep away from strong magnetic fields (speakers, laptops); rinse with fresh water if exposed to sweat; store in a dry environment.
Similar Watches
Seiko SARB065 (the original Cocktail Time), Orient Star Open Heart, Tissot Le Locle Powermatic 80. The Tissot offers a Swiss alternative with a longer power reserve but often lacks the dial texture found here.
Interesting Facts
The Cocktail Time series originated from a collaboration between Seiko and Shinobu Ishigaki, a world-renowned bartender at Tokyo's Ishinohana Bar. Each colorway is named after a specific cocktail.