Gents Seiko Prospex GMT Black Dial SPB519J1 this piece also features a

this piece also features a Tachymeter on the bezel for measuring speed – an iconic element of the original Seiko Speedtimer

it inherits the design looks of the classic Seiko chronographs from the 60s and 70s

WATER RESISTANCE (Metres): 100

Additionally

Function to prevent the GPS signal reception (in-flight mode)

Gents Seiko Prospex GMT Black Dial SPB519J1 this piece also features aMovement Caliber Number 6R54 Movement Type Automatic with manual winding Precision +25 to 15 seconds per day Power reserve Approx. 72 hours(3 days) Jewels 24 Functions Case Band Case Material Stainless steel (Bezel: Stainless steel with ceramic display) Case Size Thickness: 12. 9mmDiameter: 42. 0mmLug to lug: 48. 6mm Crystal Sapphire crystal Crystal Coating Anti reflective coating on inner surface LumiBrite LumiBrite on hands, index(es) and bezel