Seiko Hi-Beat Special 1120-7030 – October 1973 – Faceted Crystal – Integrated Bracelet – Serviced

This elegant yet technically sophisticated Seiko Hi-Beat Special from October 1973 combines several of the most exciting design and technical trends of the early 1970s: a high-frequency movement, a geometric case, and an elaborately faceted crystal.

The dating is clearly derived from the serial number 38xxxx:
→ first digit "3" = 1973
→ second digit "8" = August
→ considering the production logic of this series, October 1973 is plausible and consistent with the reference and movement.

Historical Context – Hi-Beat and the "Dress Avant-Garde" of the 1970s

In the early 1970s, Seiko was at the peak of its mechanical development:

• Introduction and expansion of Hi-Beat calibers (28,800 A/h)
• Parallel development to Grand Seiko and King Seiko
• Increasing integration of technology and avant-garde design

While Grand Seiko remained more classic, models like this emerged in parallel, which were:

• Technically sophisticated
• but significantly more experimental in design
• often with integrated bracelets and angular cases

These models are particularly interesting today because they represent a unique design line between a dress watch and futuristic 70s design.

Design

• striking, faceted case with clean edges
• typical integrated steel bracelet of the early 70s
• deep, elegantly shimmering blue dial
• applied, faceted indices
• minimalist inscription with "Hi-Beat Special"

Particularly noteworthy:

Nine-Facet Crystal

The crystal is one of the central design features:

• 9 facets (multi-level cut)
• creates different reflections depending on the incidence of light
• enhances the geometric effect of the case

In this condition – clear, without damage – it is a true highlight and rarely found.

Technology

• Seiko Caliber 1120 (Hi-Beat)
• 28,800 semi-oscillations/hour
• Manual winding (typical for these flat dress models)
• precise and finely adjustable

These calibers stand for:

• high rate stability

fine regulation

• technical proximity to higher-end lines within the Seiko portfolio

Case Height and Wearability

With a height of only 7.9 mm, the watch is exceptionally flat – especially for a Hi-Beat model.

In combination with:

• the integrated bracelet
• the elongated case (34 mm lug-to-lug)

it wears:

• very elegantly
• lightly
• and surprisingly modern

Condition

• excellent overall condition
• very clean dial without signs of aging
• case with only slight, age-appropriate signs of wear
• sharp edges, no over-polishing
• faceted crystal immaculate (rare)
• original Seiko steel bracelet present
• fully serviced in Japan (January 2026)

Bracelet

• original Seiko steel bracelet
• with safety chain – typical for ladies' watches of this period
• very harmonious with the case design

Technical Specifications

• Reference: 1120-7030
• Serial number: 381042
• Production date: October 1973
• Movement: Seiko 1120, Hi-Beat (28,800 A/h)
• Crystal: 9-facet
• Case: Stainless steel
• Dimensions: 17.6 × 34 mm
• Height: 7.9 mm
• Lug width: 10 mm (integrated)
• Weight: 30 g

Classification for Collectors

This watch is particularly interesting because it:

• is a true Hi-Beat model in the dress/ladies' segment
• has a rare, very well-preserved faceted crystal
• embodies the typical integrated 70s design
• is technically above average compared to similar models

It is therefore not a "classic ladies' model," but rather:

→ a design and technology study of the early 70s in wearable form

Warranty (used)

This is a used item. The limitation period for claims for defects (statutory warranty) is 12 months from delivery.

Note

As this is a used watch, no water resistance can be guaranteed. To protect the movement, the watch should not come into contact with water or moisture.