Seiko Prospex Blue ‘Alpinist’ GMT Powered by the newly developed Calibre 6R54 the first mechanical GMT movement in Prospex watch a three day power reserve. 72H PR GMT Compass Fuction MOVEMENT TYPE: Mechanical MOVEMENT CALIBRE: 6R54 -15/+25 seconds per day BAND TYPE: Leather Strap CLASP TYPE: Deployment DIAL COLOUR: Blue WATER RESISTANCE (Metres): 200 CASE WIDTH: 39.5mm CASE DEPTH: 13.6mm GLASS TYPE: Sapphire Crystal DATE FUNCTION: Date Only STONE TYPE: