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Entry-tier movement · caliber Seiko Cal. 7R14 -- Spring Drive, manual-wind, 72h PR; tri-synchro regulator (quartz oscillator + magnetic braking, no conventional escapement); hand-finished to Credor standard; ±1 sec/day accuracy
Versatile size: fits most wrists (6–7.5 in / 15–19 cm)
39 mm case. The sweet spot for the broadest range of wrist sizes. Neither too dainty nor too bold.
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The Credor Eichi II uses a hand-finished Spring Drive movement and a grand feu enamel dial made to a standard comparable to the finest Swiss grand feu work. Authentication concerns are not counterfeiting -- Credor fakes essentially do not exist due to the niche nature of the brand -- but model and grade misrepresentation (wrong Credor model presented as the Eichi II, or a lower Credor grade).
Known issues in the market
The Eichi II Spring Drive produces a perfectly smooth glide seconds hand with no tick or stop-start motion; this is the definitive mechanical tell.
Grand feu enamel dial has depth, translucency, and a slightly convex surface; a printed or fired enamel substitute is immediately obvious under a loupe.
Zaratsu-polished case surfaces are mirror-flat with no micro-scratches on the flat polished zones; evidence of polishing by non-Zaratsu methods shows micro-scratches at case transitions.
Area
What to check
What is correct
Red flag
movement
Spring Drive glide seconds hand
The seconds hand moves in a perfectly smooth, continuous glide with zero tick or pause; this is mechanically unique to Spring Drive and cannot be replicated by a conventional lever escapement
Any tick, hesitation, or stop-start motion in the seconds hand; the seconds hand should never jump even by the smallest increment
dial
Grand feu enamel dial quality
Enamel dial has depth, translucency, and a slight convexity; color is consistent and has no printing grain under a loupe; the dial edges show clean vitreous enamel thickness
Authentication guide
Last reviewed June 2026
The Eichi II houses Seiko's most advanced hand-finishing in the Cal. 7R14. The movement's Zaratsu-polished surfaces and hand-beveled anglage are the benchmark. No replica exists at the production standard required.
Known reproduction risks
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LOW
Non-original movement in Credor case
Movement through caseback does not show the acute anglage and flat-mirror finish of Cal. 7R14
Different beat rate (listen for 21,600 or 28,800 vph rather than the Eichi's 18,000)
Any automatic rotor visible through caseback
The finishing standard required to replicate a genuine Eichi II movement is itself at the top of the craft. Non-original movement swaps are the realistic risk, not whole reproductions.
Flat, printed appearance; any printing grain visible under magnification; inconsistent color saturation; the absence of translucency
case
Zaratsu polish on flat case surfaces
Mirror-flat polished surfaces show no micro-scratches and no orange-peel texture; reflections are perfectly clear; transitions to brushed surfaces are sharp
Micro-scratches on polished surfaces; orange-peel texture in the reflection; blurred transitions between polished and brushed zones
movement
Power reserve indicator accuracy
Power reserve indicator should read consistently with the state of wind; Spring Drive is known for accurate power reserve indication because the tri-synchro regulator is non-parasitic
Power reserve reading inconsistent with time since last wind; erratic indicator movement
Common legitimate replacements
Strap replacement is common; confirm correct Credor strap with appropriate clasp.
Expert resources: Seiko and Grand Seiko boutiques that handle Credor can authenticate via serial number. For pre-owned transactions, Japanese specialist dealers who focus on Seiko ultra-premium are the most reliable resource. The r/JapaneseWatches and Grand Seiko enthusiast communities have members with direct Credor experience.
Porcelain white dial, applied gold hour markers, cathedral hands. 39mm yellow or white gold case.
Porcelain dial with a slightly warm, non-bright white tone
Applied indices with consistent height and spacing
Lacquered hands with mirror-polished facets
Service part flags
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Movement (Cal. 7R14)
Original: Fully hand-finished. Bridges have flat, mirror-polished surfaces with acute hand-beveled edges. Visible through the caseback.
Replacement tells
Any movement other than Cal. 7R14
Anglage (beveling) that is rounded rather than a crisp acute angle
Machine-polished surfaces without the flat mirror quality of Zaratsu finishing
Any visible tool marks on polished bridge surfaces
Dial
Original: Porcelain dial, not lacquer or enamel.
Replacement tells
Glossy enamel depth (the Eichi II dial is matte-warm, not glassy)
Printed rather than applied indices
Case back markings
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All Eichi II production
Credor and Seiko markings on caseback
Cal. 7R14 designation
Serial number
Precious metal purity marking (18K or Pt)
Movement tells
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Cal. 7R14 beats at 18,000 vph; the slow beat is audible and deliberate.
The movement is manual-wind only; there is no rotor.
Through the caseback, every surface should reflect clearly. Hazy or matte surfaces on the bridges indicate the movement has been mishandled or is not original.
Power reserve indicator on dial advances smoothly with winding.
