Vintage August 1970 Serviced Seiko LM Lord Matic 5606-7000 w/ Custom Purple Dial & Refinished Case

Collecting vintage Japanese watches requires a discerning eye and deep knowledge of movement quality, case finishing, and honest assessment of restoration work—qualities that matter immensely when evaluating a 1970 Seiko Lord Matic with custom modifications. This August 1970 Serviced Seiko LM Lord Matic 5606-7000 presents a compelling but nuanced case study: a beautifully restored timepiece that blends period-correct charm with bold contemporary customization, though potential buyers should understand exactly what they’re getting and the trade-offs involved.

Overview

The Seiko Lord Matic line represents a crucial chapter in Japanese watchmaking’s golden era, occupying the prestigious middle ground between mass-market field watches and high-horology complications. Launched in the late 1960s, the Lord Matic 5606 and its derivatives earned respect among collectors for their robust automatic movements, distinctive aesthetic proportions, and surprising longevity. The “LM” designation marked these as premium variants within the Lord Matic family, incorporating refinements in finishing and case construction that separated them from entry-level Seiko offerings.

This particular example—dated August 1970—arrives as a professionally serviced timepiece with significant customization. The custom purple dial departs entirely from original Seiko specifications, while the refinished case represents intentional aesthetic intervention rather than preservation of original patina. For vintage purists, these modifications are deal-breakers; for collectors embracing modular restoration philosophy, they’re creative opportunities. Understanding this watch’s identity as a “restored custom” rather than “original survivor” is essential to proper evaluation.

Key Specifications

• Movement: Seiko Caliber 5606 automatic (27 jewels, no quick-set date)
• Case Diameter: 36mm across bezel (vintage proportions, wears smaller by modern standards)
• Case Material: Stainless steel, refinished
• Lug Width: 19mm (narrow by contemporary standards; strap compatibility limited)
• Case Thickness: Approximately 11mm; characteristically thin profile for period
• Crystal: Replacement acrylic with new crystal ring; round shape matching original LM specifications
• Water Resistance: 50 meters (5 ATM)—adequate for splash resistance, unsuitable for snorkeling or swimming
• Dial: Custom purple (aftermarket); not original Seiko finish
• Hands: Original Mercedes-style hour/minute with day-date subdial
• Day-Date Window: Quick-flip mechanism (non-quick-set caliber 5606; manual date-set only)
• Crown: Screw-down Seiko Lord Matic crown with distinctive logo; well-preserved and functional
• Strap/Bracelet: Supplied on brown leather strap; original Seiko bracelet not included
• Power Reserve: Approximately 44-48 hours (typical for caliber 5606)
• Bezel: Fixed stainless; no insert or rotation
• Service Status: Recently serviced with movement inspection and lume application documented

Hands-On Impressions

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Handling this 1970 Lord Matic immediately conveys why vintage Seiko automatics remain collector favorites despite their modest original pricing. The refinished case presents sharp, well-defined bezel edges and pristine brushed finishing on the lugs—suggesting professional case refinishing rather than polishing alone. Build quality feels reassuringly solid; the case back snaps shut with satisfying resistance, indicating proper gasket sealing and case integrity.

The custom purple dial presents a polarizing aesthetic choice. Photographically, it photographs beautifully with striking visual presence, particularly under direct light where the gloss finish catches brilliantly. However, in typical indoor lighting, the purple reads somewhat darker and moodier than intended, reducing dial legibility compared to original silver or champagne variants. The dial printing—numerals, hour markers, and branding—appears cleanly executed, though the custom nature means this is not Seiko’s original hand-applied finishing. Lume application on hour markers and hands glows adequately under UV exposure, though the intensity suggests standard Lumibrite or equivalent modern application rather than period-correct tritium (which would require professional restoration certification).

The crown operates smoothly with deliberate resistance; the screw-down mechanism engages and disengages without grinding, suggesting recent servicing addressed any stem wear. The day-date mechanism flips decisively rather than rolling, demonstrating proper quick-flip architecture. The acrylic crystal clarity exceeds what most original crystals provide after 50+ years; it’s completely scratch-free and distortion-free, though purists may note the subtle difference in light transmission compared to period-correct materials.

On the wrist, the 36mm case and 11mm thickness deliver a deceptively low-profile presence—described accurately as “ghost-like” wearing. The 19mm lug width, narrow by modern standards, contributes to this diminished wrist presence and limits strap aftermarket options. The supplied brown leather strap coordinates attractively with the purple dial, though the narrow width (approximately 16mm at the lug) restricts future strap swaps significantly.

Pros & Cons

• Excellent Movement Reliability: The caliber 5606 is a proven, robust automatic caliber; recently serviced examples run reliably for years between services. No quick-set complication means fewer failure points.
• Sharp Case Finishing: Professional refinishing has restored the case to high cosmetic standards with crisp bezel definition and well-executed brushed surfaces. Case integrity appears solid.
• Distinctive Aesthetic: The purple dial customization creates genuine visual differentiation in a crowded vintage Seiko market; this watch commands attention and conversation.
• Comfortable Proportions: Despite modern eyes preferring larger cases, the thin profile and moderate diameter deliver genuine wearability and elegant proportion by 1970s standards.
• Recent Professional Service: Documented servicing provides confidence in movement functionality and establishes baseline service intervals.

• Non-Original Dial: The custom purple finish deviates completely from Seiko’s original Lord Matic color palette, reducing collectibility for purists. Resale value may suffer; authentication documentation becomes crucial.
• Limited Strap Compatibility: The narrow 19mm lug width dramatically restricts strap options, effectively locking buyers to sourcing period-correct 19mm straps or commissioning custom alternatives. Modern strap ecosystems largely ignore this width.
• Modest Water Resistance: 50-meter rating suits daily wear but precludes swimming, snorkeling, or water sports. This limits practical utility compared to modern equivalents rated 100+ meters.
• Manual Date-Set Only: The caliber 5606 lacks quick-set date mechanism, requiring time-zone adjustment through hours of manual winding. Frequent travelers find this tedious compared to contemporary quick-set designs.
• Acrylic Crystal Vulnerability: Replacement acrylic crystal will scratch more readily than mineral or sapphire alternatives; long-term maintenance requires periodic polishing or eventual re-replacement.
• Refinished Case Longevity: Refinished cases show finish wear faster than original surfaces; this watch will require re-refinishing eventually, adding future service costs.

How It Compares

Within the vintage Japanese automatic market at approximately $400–$600 price points, this Lord Matic competes directly with earlier Seiko 6309 dive watches, Orient automatic dress pieces, and period Citizen automatics. The Seiko vs Citizen comparison clarifies that Seiko earned slightly superior reputation for finishing refinement, while Citizen often delivered superior water resistance at equivalent pricing. A non-customized original-dial 1970s Lord Matic typically prices slightly below this example, benefiting from purist authenticity appeal.

Compared to modern recommendations from our best automatics under $500 guide, this vintage Lord Matic trades modern amenities (sapphire crystal, screw-down crowns, 100+ meter water resistance) for period authenticity and distinctive aesthetic character. For buyers prioritizing reliable daily wear, modern Seiko 5 automatics deliver superior functionality. For those seeking vintage character with investment-grade original specifications, our