Vintage Seiko Lord Matic: Versions, Wear and Buying Priorities

The Lord Matic changed substantially across references. The 1968 5606-7050 combines a 36 mm tonneau-shaped monocoque case with a vertically brushed silver dial, while the 1972 5606-7230 uses the same stated diameter with a deep blue sunburst dial and faceted crystal. The 5606-7010 reaches 37 mm and keeps the more restrained silver treatment.

Colour and architecture become more assertive in the 1973 5606-7290 and 1974 5606-8040. Both are 37 mm steel watches, but the former has a vertically brushed gradient blue dial and the latter a vertically brushed charcoal gradient dial with gold-tone accents. The 5606-8040 is also known with a signed bracelet, which makes bracelet completeness relevant rather than incidental.

Value sits first in the dial, then in case definition and the correct combination of parts. Gradient finishes, applied faceted indices and faceted crystals create more room for damage or unsuitable replacement than a plain silver configuration. Between a dramatic redial and an honest silver dial, take the honest dial.

Handled Lord Matic cases at 36 mm and 37 mm occupy a compact range, but shape changes the result. The tonneau form of the 5606-7050 spreads its visual mass differently from the more conventional 5606-7010, while a faceted crystal adds height and sharper reflections without increasing the listed diameter.

Dial finish also changes wrist presence. The deep blue sunburst 5606-7230 reacts broadly to light, whereas the vertically brushed gradient dials of the 5606-7290 and 5606-8040 pull the eye along the dial. For a quieter used Seiko Lord Matic, the silver 5606-7010 is the easier choice; for stronger 1970s character, the gradient references make the clearer case.

The worst fault is a refinished dial, because it removes the surface treatment and printing that distinguish one Lord Matic configuration from another. Faceted crystals can be chipped or replaced with a shape that changes the whole profile. Over-polishing softens the case edges, and that loss is especially visible on tonneau forms and cases built around crisp planes.

Bracelet stretch and mismatched bracelets matter on examples such as the 5606-8040, which is known with a signed bracelet. A replacement crown or a married case and movement requires the same caution: period-correct does not establish that the parts left the factory together. The service history is unknown unless documentation accompanies the watch, so external preservation cannot prove mechanical condition.

Caliber markings provide a useful boundary rather than a complete verdict. The 5605 production window runs from 1968 to 1975, while the 5606 window runs from 1968 to 1976. A movement outside those supplied windows needs an explanation, but a date match alone does not rule out a franken watch.