Grand Seiko Sport Collection SBGN023 Seiko 140th Anniversary Quartz GMT

Official Grand Seiko US special page identifies SBGN023 as a Sport Collection Seiko 140th Anniversary limited edition of 2,021 pieces with Caliber 9F86 quartz GMT, ceramic 24-hour bezel, gold color GMT hand, and -10 to +10 seconds per year accuracy; case dimensions, water resistance, crystal, and…

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