Authentic Seiko S Sports 100 Dive Watch designed for parts, repair projects, or as a precise donor for a classic Seiko rebuild. This 38mm stainless steel diver carries the 7123-823H reference and features a blue bezel with a blue-toned dial and non-numeric hour markers. Note: it is a used piece that does not run, and a fresh battery will not bring it back to life. This listing is intended for repair-minded buyers or collectors who understand the value of a specific Seiko reference for parts or restoration.

Key details at a glance

• Brand/Model: Seiko S Sports 100 Diver
• Reference: 7123-823H
• Case size: 38mm
• Case material: Stainless steel
• Bezel: Blue
• Dial: Blue dial with non-numeric hour marks
• Movement: Quartz
• Condition: Used; scratch marks on case and crystal; non-working; battery will not fix it
• Ideal for: Parts, repair projects, donor watch, or vintage Seiko collectors

Why this Seiko is a smart choice for your project

For hobbyists and professional watchmakers, this Seiko Sports 100 listing offers a precise, identifiable donor with a classic diver aesthetic. The 38mm case size hits a sweet spot for many wrists, and the blue bezel paired with a blue dial delivers that unmistakable Seiko dive-watch vibe. Because the watch is non-functional, it presents a legitimate opportunity to source specific components—case integrity, bezel insert, dial, hands, and movement parts—without paying for a fully working model.

Who this is ideal for

• Watchmakers seeking a precise reference (7123-823H) to complete a restoration or build
• Collectors aiming to preserve or re-create the Seiko Sports 100 diver lineage
• DIY enthusiasts working on repair projects who understand the time and care needed to revive a non-working quartz diver

What problems this helps solve

• Donor for movement, dial, hands, bezel, and crystal when you have a mismatched set
• Opportunity to refurbish a Seiko Sports 100 lineage for a custom build with vintage appeal
• Low-cost path to maintaining a Seiko dive-watch collection by sourcing specific parts instead of a complete new model

Practical tips for buyers

• Validate compatibility with your existing Seiko Sports 100 parts by matching the reference 7123-823H
• Assess the bezel insert, crystal, and case for restoration feasibility; cosmetic scratches are present and there’s no guarantee of water resistance after repair
• Best suited for experienced hobbyists or repair shops who can source, test, and fit components with care
• Consider this as a dedicated parts donor rather than a ready-to-wear timepiece

Shipping discounts are available when you combine items. If you’re pursuing a tailored restoration or parts-based project, this Seiko Sports 100 donor watch is a focused, authentic foundation—offering the exact reference and diver styling that serious Seiko enthusiasts value.