Seiko Presage SPB527 Classic Series Blue Dial Heartbeat Automatic Casio G-Shock G-Steel Bluetooth Connected GSTB200-1 This Field series features a

This Field series features a three hand automatic day-date movement in a 43mm case and is available with either black or silver dial on smooth buffalo leather straps

the model with the large date function

The brand makes its own prototypes in-house

Europe and China

Seiko Presage SPB527 Classic Series Blue Dial Heartbeat Automatic Casio G-Shock G-Steel Bluetooth Connected GSTB200-1 This Field series features aMovement: Automatic Caliber: 6R5J Precision: +25 to 15 seconds per day Power Reserve: Approx. 72 hours (3 days) Jewels: 24 Case Material: Stainless steel (super hard coating) Case Diameter: 40. 2mm Case Length (Lug to Lug): 46. 0mm Case Thickness: 13. 0mm Crystal: Dual curved sapphire crystal Crystal Coating: Anti reflective coating on inner surface Clasp: Deployment clasp with push button release Lug Width: 20mm Water Resistance: 10 bar Magnetic