Seiko 5 Automatic 21J 7S26-01R0 1990s Original Dial 35mm Arabic Day Calibre 7S26

Watch Summary

This 1990s Seiko 5 Automatic 7S26-01R0 is a 35mm automatic watch with a silver-pattern dial, 21-jewel Seiko 7S26 movement and English/Arabic day-date display, giving it a restrained patterned presentation.

Its original dial, hands, mineral-glass crystal, case, case back, crown, movement and stainless-steel bracelet are retained, with the technician recording the watch as appearing original and virtually unworn.

Recorded results for this watch

• Passed the TickerWorks 48-hour run test and time check.
• Quickset function operating correctly.
• Timegrapher snapshot at the time of testing: +2 seconds/day, 268° amplitude and 0.8 ms beat error.

TickerWorks® Assurance

Every TickerWorks watch is checked, tested and transparently disclosed through the TickerWorks® Assurance process before being offered for sale.

• Inspection & disclosure: Recorded condition, originality and any replacement or refurbished components are clearly disclosed.
• Timegrapher checked: Every mechanical watch is checked on a timegrapher, with amplitude and stable running prioritised over chasing a single rate figure.
• Regulation: Where appropriate, regulation is brought as close as practicable to the movement’s expected factory rate.
• 48-hour run test: Every watch undergoes a 48-hour run test before being placed into stock.

Condition & Originality

TickerWorks® Parts Originality Index (POI)
A transparency measure within TickerWorks® Assurance, showing the balance between assessed originality and refurbishment across eight key components.

POI: 10.0/10

• Higher POI: More assessed original components retained — especially relevant to collectors who prioritise originality.
• Lower POI: More components replaced or refurbished — often more relevant to buyers seeking a cleaner, refreshed daily wearer.
• POI is not a condition or quality score: it simply shows the balance between originality and refurbishment.

Originality: Original dial, hands, mineral-glass crystal, case, case back, crown, movement and bracelet.

Replacement Components: No replacement components are recorded.

Parts Period Correct: Yes

Condition: The technician notes that the watch appears original and virtually unworn.

Bracelet or Strap: Original stainless-steel bracelet in good condition and full length.

Specifications

• Brand: Seiko
• Model: Seiko 5 Automatic 21J
• Internal model: 7S26-01R0
• Movement: Seiko 7S26 automatic, 21 jewels
• Case size: 35 mm
• Dial colour: Silver patterned
• Period: 1990s
• Case back: Original case back
• Crown: Original crown
• Bracelet or strap: Original stainless-steel bracelet in good condition, full length
• Functions: Day-date display, English/Arabic day display, quickset function operating correctly

Historical Context

The Seiko 5 line is one of Seiko’s long-running automatic families, and the 21-jewel 7S26 calibre was introduced in the mid-1990s and used across a wide range of Seiko 5 day-date models.

TickerWorks Strap & Bracelet Policy

TickerWorks may supply a replacement or period-correct bracelet or strap where the original is not available or no longer suitable for use. Any replacement is clearly stated in the description. All bracelets and straps are fitted for presentation and checked for secure attachment only.

TickerWorks does not offer bracelet adjustment services. Final sizing should be carried out by a qualified watchmaker.

Notes & Caveats

Photos form part of the description.

Water resistance is not guaranteed.

Vintage mechanical tolerance is approximately ±1 minute per day.

Temperature change, shock, positional variation and moisture ingress can affect mechanical timekeeping.

Service history is unknown unless stated.