Seiko 2-Jewel Manual Wind Ladies Cocktail Watch (Calatrava-style Octagonal)
Ladies Cocktail / Dress Watch · Seiko (Seiko Group), a vertically integrated Japanese manufacturer known for precision and accessibility.
Period: Mid-Century Modern (1960s-1970s). The octagonal case and minimalist dial are hallmark traits of the late 60s transitioning into the 70s aesthetics.

Type
Ladies Cocktail / Dress Watch
Brand
Seiko (Seiko Group), a vertically integrated Japanese manufacturer known for precision and accessibility.
Movement
Manual-Wound (Hand-wind), likely Seiko 2-Jewel or similar low-jewel count mechanical caliber designed for ultra-thin ladies cases.
Dimensions
Case diameter: approx 15-18mm (excluding crown); Thickness: 7-8mm; Lug-to-lug: 30mm (including integrated links). This is an extremely petite 'jewelry' sized timepiece.
Description
This is a classic example of a mid-century Seiko cocktail watch. Designed to function more as a piece of jewelry than a precision instrument, it features a slender, elongated octagonal case that flows into a minimalist open-link bracelet. This aesthetic was highly popular for formal wear, where the watch was intended to be discreet and elegant.
Key Features
Octagonal geometry, 2-jewel manual movement, integrated bangle-style lugs, and minimalist 'stick' handset.
Dial Description
Champagne or 'linen' toned dial with a vertical orientation. It features minimalist printed baton indices at the 12 and 6 positions, simple black stick hands, and 'Seiko' branding with '2 Jewels' text.
Case Material
Base Metal (likely Rhodium or Chrome plated) with a Stainless Steel caseback. The visible wear shows the base alloy beneath the plating.
Crystal Type
Acrylic/Plexiglass, faceted or flat, showing significant surface scratching and edge wear.
Bezel Details
Fixed, integrated into the octagonal case design. The stepped bezel provides a geometric Art Deco-inspired silhouette.
Crown & Pushers
Small, knurled push-pull crown located at the 3 o'clock position (right side when worn vertically). No crown guards.
Bracelet or Strap
Integrated open-link 'bangle' style bracelet. It features a split-lug design in base metal with a jewelry-style clasp.
Caseback Details
Solid, snap-on stainless steel caseback. Usually contains the serial number and movement-case reference (e.g., 11-XXXX).
Movement Type
Manual-Wound (Hand-wind), likely Seiko 2-Jewel or similar low-jewel count mechanical caliber designed for ultra-thin ladies cases.
Water Resistance
Non-water resistant. Original rating was likely 'Splash Resistant' at most, but currently should be kept completely dry.
Origin & Provenance
Japan. Features an in-house Seiko mechanical movement.
Age Estimate
Circa 1968-1975 based on the dial typography and the move toward more geometric, jewelry-focused designs in the ladies' line.
Cultural Significance
Represents the era when watches for women were primarily marketed as evening accessories rather than tool watches. It reflects the post-war boom in 'affordable luxury.'
Condition Notes
Fair to Poor. The plating is significantly worn on the case and bracelet, showing the brassy base metal underneath. The crystal is heavily scratched, and the dial shows signs of oxidation/patina around the edges.
Value Estimate
$20 - $60 USD. These are common on the vintage market and, unless in precious metal (14k gold), they hold primarily sentimental or decorative value.
Care & Maintenance
Mechanical movements of this size are delicate; avoid all water contact as gaskets are likely perished. Wind gently until resistance is felt. Professional cleaning of the case is recommended to prevent further corrosion.
Similar Watches
Vintage Citizen Cocktail watches, Bulova 'Dior' series, and Omega Ladymatic (though the Omega is higher tier).
Interesting Facts
During this era, Seiko produced hundreds of variations of these cocktail watches to compete with Swiss brands like Omega and Longines, helping them dominate the global market by offering mechanical reliability at a fraction of the price.