Seiko Lord Matic Special 5206-6020 – Caliber 5206, 23 jewels, Daini Seikosha – anthracite dial – April 1971 – freshly serviced

Many are familiar with the Lord Matic. Few realize it was produced in two entirely independent constructions.

On the dial of this watch, below the 23 JEWELS specification, is a small lightning bolt. The same bolt appears on the case back. It signifies that this movement was made by Daini Seikosha in Tokyo.

The standard Lord Matic with the 5606 caliber features a swirl in the same spot – the logo of the Suwa factory in Nagano. Two factories, two calibers, one model name.

Competition in-house

For decades, Seiko maintained two completely separate production arms that competed against each other. Corporate management explicitly encouraged this: whoever built the better movement won the contract. Suwa brought out the first Grand Seiko in 1960, Daini responded in 1961 with the first King Seiko; over fifteen years, this evolved into one of the most productive rivalries in horological history.

With the Lord Matic, this competition extended to the level of the model line itself. Seiko assigned the same name to both movements and let them develop their own solutions: Suwa the 5606 caliber, Daini the 5206 caliber.

The Daini version carried the additional "Special" designation – the more highly regulated variant within the series.

For collectors, that is the point. Four out of five Lord Matics offered today are Suwa 5606s. The Daini Special is the rarer side of the same series, and it costs barely more. Anyone who places both side by side has the Seiko factory rivalry represented in a single model series.

The Dial

The tone is a deep, cool anthracite with a fine radial sunburst finish that runs from the center outwards. Depending on how the light hits it, the surface shifts between a bright tin-gray and an almost black dark – in the shade, the watch appears serious and reserved; under direct light, the gray opens up and becomes vibrant.

Gray dials were the rarer choice for Seiko in the early 1970s; the majority of Lord Matics were silver. Compared to a colored dial, gray has the advantage of matching everything without appearing mundane.

The hour markers are applied, faceted batons with polished flanks and sharply defined edges; at twelve o'clock, they are executed as a double index. They are the only bright point on an otherwise dark surface and carry the contrast alone. Complementing these are slim polished hands and a fine center-sweep seconds hand.

The dial is sparsely labeled: SEIKO AUTOMATIC at the top, LM Special / 23 JEWELS with the Daini lightning bolt at the bottom. Circling the perimeter is a fine minute track on a slightly recessed ring. The calendar window at three o'clock is framed with an applied border.

The 5206 Caliber

• Automatic with auxiliary manual winding
• Hacking seconds when the crown is pulled – setting the time to the exact second
• 23 jewels
• Quick-set for day and date
• Bilingual day wheel, Japanese and English
• Manufactured by Daini Seikosha, Tokyo

The bilingual day wheel follows the Japanese calendar convention: Sunday in red, Saturday in blue. In the photo, it shows Thursday 木 – a detail not found on European watches that reveals the watch's origin at a glance.

The feature list was remarkably comprehensive in 1971. Many European automatic movements in the same price range offered neither manual winding nor hacking seconds; the combination of both, plus a quick-set for day and date, clearly set a watch apart from the entry-level class in the Japanese catalog.

Case

The stainless steel case follows the design language that Taro Tanaka formulated at Seiko as the "Grammar of Design": flat, sharply defined surfaces instead of rounded transitions, angular lugs, a flat-polished bezel. Tanaka's principle was that every surface should reflect light in a defined direction – which only works as long as the edges remain crisp.

With a diameter of 34.7 mm and only 39 mm lug-to-lug and 9.6 mm in height, the watch is exceptionally compact. It is therefore the smallest and flattest Lord Matic in this series – dimensions that are hard to find today and which sit cleanly even on slender wrists.

The crystal is a mineral glass, which is more scratch-resistant than the acrylic crystals also common at Seiko during this period.

Condition

Technically flawless. The watch was professionally serviced in Japan in the spring/summer of 2026 – completely disassembled, cleaned, oiled, and regulated. Automatic winding, manual winding, hacking seconds, and the day/date quick-set all function perfectly.

The dial is well-preserved: the sunburst finish is even throughout, without spots, fading, or discoloration. The lettering is complete and sharp, the applied indices are secure and free of corrosion, and the calendar frame is intact.

The stainless steel case shows age-appropriate signs of wear, more noticeably in places on the bezel edge. The surface transitions are preserved; the watch has not been over-polished. The case back shows the usual fine scratches from opening and wearing; all engravings – reference 5206-6020, serial number 143401, Daini lightning bolt – are complete and clearly legible. The mineral glass is clear.

Mounted is a third-party stainless steel bracelet; it is not the original Seiko band.

Technical Specifications

• Brand / Line: Seiko, Lord Matic Special (LM Special)
• Reference: 5206-6020
• Serial number: 143401
• Production date: April 1971
• Movement: Seiko caliber 5206, automatic with manual wind, 23 jewels, hacking seconds
• Manufacturer: Daini Seikosha, Japan
• Functions: Hours, minutes, center seconds, day and date with quick-set, bilingual day wheel (Japanese/English)
• Case: Stainless steel
• Crystal: Mineral glass
• Diameter (without crown): 34.7 mm
• Height: 9.6 mm
• Lug-to-Lug: 39 mm
• Lug width: 18 mm
• Weight (incl. bracelet): 72 g
• Bracelet: Third-party stainless steel bracelet
• Service: Spring/Summer 2026, Japan – full disassembly, cleaning, oiling, regulation

For whom

For collectors who want to fully represent the Seiko movement rivalry. Those who already own a Lord Matic with the Suwa 5606 caliber can acquire the Daini counterpart here – the same series, a different movement, a different mark on the dial.

For everyone looking for a dark dial that isn't black. Anthracite with a sunburst finish behaves completely differently in light than a matte black and is suitable for many more occasions.

And for slender wrists: 34.7 mm in diameter with 39 mm lug-to-lug and 9.6 mm height are dimensions that are virtually no longer manufactured today. This watch wears unobtrusively and disappears under a shirt sleeve.

Warranty (used)
This is a used item. The limitation period for claims for defects (statutory warranty) is 12 months from delivery.

Note
As this is a vintage watch, water resistance cannot be guaranteed. To protect the movement, the watch should not come into contact with water or moisture.