Seiko 4R39 Movement | Japan 4R39A Auto | Open Heart + 24H sub | 4R38 / 4R37 Com. 4 สิงหาคม 2026 0 Caliber: 4R39A. 100%... Read MoreRead more about Seiko 4R39 Movement | Japan 4R39A Auto | Open Heart + 24H sub | 4R38 / 4R37 Com.