Seiko Lord Matic 5606-5000 - a compact square-case buying guide

The 5606-5000 was built as a compact automatic watch with a practical day-date display rather than as a conventional round dress watch. Its square cushion-form steel case and dark grey dial place the design firmly between 1969 and 1973, while the applied furniture gives the small face enough depth to avoid looking flat.

The calendar can display English and Kanji, giving the watch a functional detail that is visible every day. Dial configurations include applied Roman numerals at 12, 6 and 9 as well as applied square markers, so either layout can be correct when the remaining components agree with the reference.

The dial decides the spread between two otherwise similar 5606-5000 examples. Vertically brushed grey surfaces catch light in bands, while dark sunburst dials change more gradually; visible spotting, edge oxidation or a refinish matters more than whether the furniture uses Roman numerals or square markers. A cleaner original dial should take priority over the more decorative layout.

A fitted slotted bracelet adds period character, but its value depends on end-link fit and the amount of stretch rather than pattern alone. The square case also needs enough definition to frame the dial properly. Between a softly polished watch with a clean bracelet and a sharper case with an honest dial, the sharper case and dial are the stronger purchase.

Dial damage is the first loss to price in. Surface spotting can interrupt the dark finish, oxidation can gather around the edge, and corrosion on the hands can make a clean dial look mismatched. A redial is more damaging than those honest faults because the vertical brushing, applied logos and original printing are difficult to reproduce as one coherent surface.

Polishing rounds the square case first at the corners and softens the transition into the lugs. Slotted bracelets can develop stretch, while replaced hands, calendars or movements can turn an individually genuine set of parts into a franken watch. The service history is unknown unless documentation accompanies the specific watch, so caliber identity alone should never be treated as proof of mechanical condition.