Gents titanium Seiko Solar Astron Perpetual Calendar Chronograph with titanium bracelet. GPS controlled time with 39 time zones engrave on ceramic bezel. Black baton dial with 3 sub dials and date display. Anti reflective sapphire crystal. Seiko Astron: the world’s first GPS solar watch which never needs a battery change – powered by light, automatically adjusted to your time zone through the latest GPS technology Model ref:SSE003J1