Seiko Lord Matic 5606-7010 - What to Know Before Buying

The 5606-7010 put the automatic caliber 5606, a day-date display and applied faceted indices into a stainless-steel Lord Matic intended for regular professional wear. Its place below King Seiko and Grand Seiko, and above Seiko 5, explains the balance: the watch is restrained enough for daily use, while the dial treatment and case geometry carry more visual work than ornament would.

Known 5606-7010 production runs from 1968 through 1972, placing the reference across the turn into the 1970s. Silver dials came with materially different surfaces, including sunburst, vertical brushing and linen texture. Those are not interchangeable descriptions - a linen dial scatters light in a fine grid, while the vertically brushed version reads in one direction.

The dial carries the largest share of value. Between comparable 5606-7010 examples, an intact linen or vertically brushed surface deserves a premium over a refinished dial because a redial erases the reference's most visible distinction. Minor micro-oxidation beside the day-date aperture is less damaging than a complete refinish when the original texture and applied faceted indices remain intact.

Case geometry creates the next meaningful spread. Strong lines suit the angular dial furniture, while repeated polishing leaves soft or mushy lugs and removes definition that cannot be returned at service. Between a sharp 36 mm example with honest wear and a rounded 37 mm example with more shine, take the smaller watch. Jewel count alone should not decide it - handled examples contain both 23-jewel and 25-jewel caliber 5606 movements.

A refinished dial is the costliest fault because it replaces the sunburst, vertical-brushed or linen surface with an approximation. Oxidation can also develop around the day-date aperture, and the hands may corrode even where the dial remains clean. Neither issue should be disguised as patina: attractive ageing is even, while local staining and visible hand oxidation are damage.

Over-polishing is the principal case risk on this stainless-steel reference, first softening the lines that give the 5606-7010 its shape. Replacement crowns and mixed components require caution because period-correct is not the same as original, and a franken watch may combine genuine Seiko parts that never shipped together. The service history is unknown unless paperwork accompanies the watch, so caliber 5606 condition must be judged by current operation rather than seller wording.