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Erwin Dekker

This is an exceptional opportunity to acquire a near-new-old-stock Seiko LM 5606-7300 featuring the highly desirable "Gradient Blue Sunburst" dial—one of the most striking and sought-after variants from Seiko’s golden era of automatic watchmaking. This piece stands out thanks to its deep blue sunburst dial, which transitions from a vibrant center to rich, inky edges in a mesmerizing gradient effect. The unique facet-cut glass amplifies the sunburst motif with dramatic radiance, creating a captivating interplay of light that changes depending on the viewing angle.

Not only is this reference already rare, but finding one in such outstanding, near-mint condition is truly remarkable. The crisp case lines remain sharp, the vibrant gradient dial is immaculate, and the original multi-link bracelet adds period-correct flair, fitting wrists up to 18.5cm. This 5606-7300 is a true collector’s gem—an ideal choice for those seeking a retro Seiko with undeniable wrist presence and standout vintage aesthetics.

Brand: Seiko
Model: LM "Gradient Blue Sunburst"
Reference Number: 5606-7300
Serial Number: 412937
Movement: Seiko Automatic Caliber 5606, 23 Jewels, Day-Date
Dial: Metallic gradient sunburst blue with gold and silver applied indices, date and day display at 3 o’clock
Case Size: 36mm (excluding the crown)
Case Material: Stainless Steel
Production Year: 1974
Condition: Near new old stock condition; running and keeping time within vintage tolerances

Dial and Hands
The dial is a rare “gradient blue sunburst” design, transitioning from vivid blue to navy at the edges. Faceted crystal creates a brilliant kaleidoscopic effect, showcasing the sunburst finish in a dramatic fashion. Gold-framed applied markers and dauphine hands with original luminous fill complete the elegant, vintage aesthetic. Day and date wheels are crisp with Japanese/English language indication.

Case and Crystal
Original stainless steel case is in outstanding, near-NOS condition, retaining sharp factory edges and original brushed and polished surfaces. The geometric case profile presents beautifully and is complemented by a spectacular original facet-cut mineral glass, which dramatically enhances the dial’s visual impact. No visible dents or major scratches.

Movement
Powered by the robust Seiko 5606 automatic caliber, with hacking seconds and quickset day/date. The movement is running smoothly and keeping time within vintage tolerances. Signed Seiko rotor visible upon caseback opening.

Strap
Comes on the original Seiko signed stainless steel multi-link bracelet, fitting wrists up to 18.5cm. Bracelet is in excellent near-mint condition, showing minimal stretch or wear.

Condition
Exceptionally preserved; near new old stock with only the slightest handling/storage marks. All functions working as intended. This is a stand-out example rarely seen in the market.

Dimensions
Case diameter: 36mm (excluding crown)
Lug-to-lug: 42mm
Thickness: 11mm
Bracelet: Original signed steel, fits up to 18.5cm wrist

Remarks
Stunningly preserved collector-grade Seiko LM 5606-7300 with an extraordinary gradient blue sunburst dial and rare facet-cut crystal. A superb example of Seiko’s innovative and elegant 1970s design, presenting a wonderful opportunity for Seiko enthusiasts and collectors of vintage Japanese watches.

History
Launched in the early 1970s, the Seiko LM (Lord Matic) series was known for its technical refinement and bold styling. The 5606-7300 is famous for its quickset automatic movement and innovative design language, embodied here in one of the model’s most vibrant and captivating dial configurations. Few survive in this outstanding condition, making this a true prize for the discerning Seiko collector.

Payment and Shipping
Payment must be completed within 1-3 days after purchase.
The watch will be securely packaged and shipped with tracking and insurance for your peace of mind.
Please review the pictures carefully before bidding. I strive to showcase the watch from multiple angles for an accurate representation.
As with all vintage watches, water resistance is not guaranteed.
The watch will be delivered in fully functional working condition.
If you have any questions, feel free to contact me after the auction ends.

/ Vintage Watches DK

Automatic - Stainless steel

Seiko - LM "Gradient Blue Sunburst" - 5606-7300 - Men - 1974

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Seiko - LM "Gradient Blue Sunburst" - 5606-7300 - Men - 1974

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