PRE-SALE Grand Seiko Heritage Collection Spring Drive Watch SLGA007 COMING SOON. Pre-Owned Grand Seiko Heritage Collection Spring Drive Lake Suwa Limited Edition (SLGA007) self - winding automatic watch, features a 40mm stainless steel case surrounding a blue dial on a strap. Functions include calendar, date and power reserve indicator. This watch comes complete with box and papers. 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 opportunities and ...