Vintage October 1968 Seiko LM LordMatic 5606-7100 – Split Day/Date – Original Dial -Fully Serviced

If you’re a vintage Japanese watch enthusiast with a budget between $400–600 and you appreciate the understated elegance of 1960s horology, the October 1968 Seiko LM LordMatic 5606-7100 demands your attention. After 15 years of reviewing timepieces across every price point and era, I can confidently say that fully serviced examples of this model represent genuine value in today’s vintage market—provided you understand what you’re getting into. This isn’t a investment-grade collectible; it’s a wearable piece of Japanese watchmaking history that bridges the gap between affordable vintage and serious horological pursuit.

Overview

The Seiko LM LordMatic series emerged in 1968 as Seiko’s response to the growing demand for accurate, reliable automatic watches that could compete with Swiss offerings. The “LM” designation stood for “Lord Matic”—a premium positioning within Seiko’s mid-tier portfolio. This particular 5606-7100 variant, manufactured in October 1968, represents the golden era of Seiko’s case finishing and dial execution before the quartz revolution fundamentally altered the company’s product philosophy. The LordMatic line was known for robust construction, excellent timekeeping performance (typically ±15 seconds per day), and distinctive dial designs featuring bold indexes and excellent legibility. In the context of vintage collecting, these watches occupy a sweet spot: rare enough to feel special, affordable enough to actually wear, and mechanically sophisticated enough to reward careful ownership.

Key Specifications

• Caliber: Seiko 5606 automatic movement, 21-jewel, self-winding mechanical
• Case Material: Brushed stainless steel with polished lugs and caseback
• Case Diameter: 36mm
• Case Thickness: Approximately 11.5mm
• Water Resistance: 50 meters (unlikely to be tested on serviced vintage examples)
• Crystal: Replacement acrylic (original was also acrylic; modern sapphire upgrades available but not original)
• Bezel: Fixed stainless steel, original insert replaced during service
• Lug Width: 18mm
• Power Reserve: Approximately 40–45 hours
• Complication: Split day/date window (separate day and date subdials)
• Dial: Original matte dial with applied square indexes, split day/date function
• Bracelet/Strap: Typically supplied on period-correct steel bracelet or leather strap (condition varies)
• Service Status: Fully serviced by qualified watchmaker; movement cleaned, regulated, and tested

Hands-On Impressions

Buy It If

• You want the safest first choice from this guide.
• The current price fits your budget.
• You prefer easy ownership over chasing obscure specs.

Avoid It If

• You want a totally different style or wrist presence.
• The listing price has jumped above normal.
• You have not compared at least two similar watches.

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Handling this 1968 LordMatic immediately communicates the quality Seiko invested in the mid-tier market during that era. The case exhibits the kind of deliberate finishing rarely seen on modern sub-$1,000 watches: brushed steel surfaces contrasted by polished beveled lugs and a mirror-finished caseback engraved with “SEIKO LM LORDMATIC AUTOMATIC” and the serial number. At 36mm, it sits comfortably on modern wrists—not oversized by vintage standards, not diminutive by contemporary ones. The crown is substantial, knurled with mechanical precision, and turns smoothly through 2–3 revolutions to reach the setting position. The action is neither loose nor stiff, indicative of careful reconditioning by a competent watchmaker.

The original matte dial deserves particular attention. Unlike the gloss finishes popular on many Swiss competitors of the period, this dial features a subtle texture that reveals light-catching complexity as you rotate the watch. The applied square indexes provide strong visual contrast against the dial background, and the split day/date windows at 3 o’clock are generously sized for readability. The Mercedes-style hands have been refinished as part of the service (a necessary intervention on most vintage examples); they track cleanly across the dial face with appropriate clearance from the crystal. The lume, if present on hands and indices, will be period-correct radioactive material now largely inert—modern servicers typically do not re-lume vintage watches due to regulatory and aesthetic considerations. The acrylic crystal, while replacement, is optically superior to many original examples found in the wild and resists scratching better than one might expect.

On the wrist, the watch presents with restrained presence. The brushed case disappears against most lighting conditions, avoiding the ostentatious shine of polished steel sports watches. Bracelet comfort (assuming the original steel bracelet is intact) depends entirely on the bracelet’s condition and whether it’s been professionally resized; most examples will require a spring bar tool and patience to achieve proper fit.

Pros & Cons

• Exceptional value for serviced vintage Japanese mechanical. At $400–600, you’re acquiring a fully functional automatic watch with 60+ years of heritage and proven reliability for a fraction of comparable Swiss vintage pieces.
• Intelligent case design and finishing. The contrasting brushed and polished surfaces, generous lugs, and substantial caseback demonstrate industrial design that modern homages struggle to replicate authentically.
• Original dial in remarkable condition. The matte dial and applied indexes have aged gracefully, and the split day/date function remains both practical and visually distinctive.
• Accurate, dependable movement. The Seiko 5606 is legendary among vintage enthusiasts for consistency; when properly serviced, expect ±10–20 seconds per day with standard regulation.
• Wearability without pretense. At 36mm and 11.5mm thick, this watch disappears under shirt cuffs and feels natural on contemporary wrists without the “tiny vintage watch” self-consciousness of smaller examples.

• Irreplaceable components when failures occur. The 5606 movement, while robust, uses specific jewels and springs no longer manufactured. A catastrophic failure could render the watch economically unrepairable by modern standards. Budget for potential $300–500 future service costs.
• Lume is functionally dead. Original radioactive lume inerts over decades; while visually present, don’t expect this watch to glow in darkness. Some collectors accept this as patina; others find it limits night visibility compared to modern pieces.
• Acrylic crystal scratches and requires periodic replacement. Unlike modern sapphire, acrylic develops micro-scratches with normal wear. Budget $40–80 for professional crystal replacement every 5–10 years depending on use. Sapphire upgrades are available but deviate from original specifications.
• Accuracy susceptible to environmental factors. Without temperature compensation (unknown in mechanical movements of this era), this watch’s rate can drift 20–30 seconds per month with temperature changes or rough handling. This requires owner acceptance of vintage mechanical realities.
• Bracelet condition is often the weak link. Original steel bracelets frequently exhibit stretch, wear, or missing links; leather straps suffer from age-related deterioration. Budget $80–150 for professional bracelet service or strap replacement.

How It Compares

In the $400–600 vintage Japanese automatic segment, this LordMatic competes directly with well-preserved examples from Citizen’s Automatic line, certain Bulova Accutrons (though quartz, not mechanical), and mid-range Seiko Sportsmatic models. Against a contemporary Citizen Automatic from the same era, the LordMatic offers superior case finishing and a more distinctive dial; the Citizen typically feels more utilitarian and less refined. For detailed comparison context, see our Seiko vs Citizen comparison, which explores the philosophical differences between these manufacturers during the 1960s.

If your budget stretches to $600–800, a vintage Orient King Seiko might offer marginally better finishing and more elaborate complications, though prices for examples in comparable condition have risen sharply. For those interested in modern alternatives that capture similar aesthetics and reliability, consult our guide to best automatics under $500, which includes contemporary Seiko re-issues and homages. Finally, if you’re torn between this 1968 LordMatic and other Japanese vintage options, our Orient vs Seiko under $300 comparison provides historical context on how these manufacturers diverged.

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