Pre-Owned Grand Seiko Sport Collection Hi-Beat 36000 GMT SBGJ237. Pre-Owned Grand Seiko Sport Collection Hi-Beat 36000 GMT (SBGJ237) self - winding automatic watch, features a 44.2mm stainless steel case surrounding a midnight blue dial on a stainless steel bracelet with folding buckle. Functions include hours, minutes, seconds, date and GMT. This watch comes with the original box and manual. WatchBox is the global destination for luxury pre-owned timepieces, offering an expertly curated inventory of luxury pre-owned watches for sale, personalized client services, educational ...