Here is a striking example of Seiko’s mid-century engineering: the Seiko LM (Lord Matic) ref. 5606-7150. Renowned for its robust automatic movement and timeless case design, this model represents one of the most versatile Japanese dress watches from the early 1970s. With a crisp silver sunburst dial, applied indices, and classic day-date complication, this piece combines daily practicality with understated elegance. The 37mm case delivers modern wrist presence, while the high-performance 5606 movement—serviced and performing exceptionally within +3 to +6 seconds per day with strong amplitude—ensures collector-grade reliability. An excellent addition to both Seiko aficionados and vintage enthusiasts seeking an authentic, well-preserved piece. Brand: Seiko Model: LM (Lord Matic) Reference Number: 5606-7150 Serial Number: 251201 Movement: Seiko 5606 automatic, 23 jewels, day-date with quickset Dial: Silver sunburst, applied hour markers, black-on-white minute track, black hands with matching sweep seconds Case Size: 37mm (excluding the crown) Case Material: Stainless Steel Production Year: 1972 Condition: Serviced, running at +3 to +6 s/d with strong amplitude Dial and Hands The dial presents beautifully with a sharp silver sunburst finish, clearly defined applied indices, and a matching stick handset. The black minute markers and subtle dial printing remain crisp. Day-date aperture at 3 o’clock changes precisely. Lume plots (if present) are clean and even. Case and Crystal The 37mm stainless steel case retains strong lines and original brushing with minimal wear visible. The original caseback engravings are sharp and legible. The acrylic crystal is clear, showing only negligible handling marks, and the crown operates smoothly. Movement Equipped with Seiko’s venerated 5606 automatic movement, this example has been recently serviced and is performing within +3 to +6 seconds per day with strong amplitude. Day and date quickset mechanisms function as designed. Strap Fitted on a high-quality black leather strap with white contrast stitching, complementing the vintage aesthetic of the watch. The strap appears unworn and comfortable on the wrist. Condition This watch is in excellent vintage condition with strong case geometry, a clean dial, and flawless movement performance. All functions operate as intended. Dimensions Case Diameter: 37mm (excluding the crown) Lug-to-Lug: Approx. 41mm Case Thickness: Approx. 11mm Lug Width: 18mm Remarks A superbly preserved and mechanically sound Seiko LM 5606-7150 with a strong silver sunburst dial and well-preserved case. The reliable 5606 movement with quickset day-date and hack feature makes this a practical and collectible addition to any vintage Seiko collection. History The Seiko Lord Matic series was launched in 1968, targeting the domestic Japanese market with watches featuring automatic quickset movements and elegant design. The 5606-7150 variant combines a robust 5606 movement with a distinctive oval case shape, offering both form and function to discerning collectors. These models are especially prized for their innovative engineering and elegant, restrained styling. 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 SKU: SEIEYJM2Z0000