Credor Caliber 7r31 Seiko Spring Drive

Credor Caliber 7R31

Credor Caliber 7r31 Seiko Spring Drive

Brand Credor (Seiko Watch Corporation)
Caliber Number 7R31, 7R31A
In-House?
Yes
Movement Type Spring Drive, manual-wind
Diameter
Unconfirmed
Height
Unconfirmed
Jewel Count
30
Frequency
32,768 Hz
Claimed Accuracy
Within 15 sec/month (1 sec/day)
Power Reserve
72 hours (3 days)
Integrated Circuit
C-MOS-IC: Oscillator, Frequency Divider, Spring Drive Control Circuit
Anti-Shock Device
Diashock
Hand Count 4 (3 on front, 1 on back)
Functions Central hours; central minutes; central sweeping seconds; power reserve indicator on the back
Hacking Seconds?
Yes
Country of Manufacture Made in Japan
Known Models
Credor Kuon (ref: GCLX997, GCLX999) (Add your watch to the comments below…)

The Credor caliber 7R31 (7R31A) is a manual-wind Spring Drive movement found in Credor Kuon watches only available in the Japanese market.

Watches with this movement were introduced on September 29, 2023.

Credor Caliber 7r31 Kuon Caseback

Credor 7R31 VS Grand Seiko 9R31:

The calibre 7R31 appears to be the Credor version of the Grand Seiko caliber 9R31. Both movements share the same specs and are both produced by Seiko. Cosmetically, differences can be seen in the finishing, branding (obviously), font, and the design around the power reserve indicator.

Credor 7r31 Vs Grand Seiko 9r31

Editor’s Humble Opinion: There are cool design elements in both movements that would make for an awesome caliber if they were combined. See the quick artistic rendition concept movement below as an example:

Credor 7r31 Vs Grand Seiko 9r31 Artistic Rendition Concept Movement

Timepieces with this caliber:

Additional Resources:

Seagull Caliber St19

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