Seiko Astron GPS Solar 10th Anniversary 42.7mm titanium automatic watch featuring a silver dial, GPS function, date display, dual-time function, power reserve indicator and satellite acquisition status display function on a titanium bracelet with three-fold clasp with push button release. Caliber: 5X53. Water resistant to 10 bars. Sapphire crystal. Limited Edition of 1500pcs. Astron GPS Solar Titanium Limited Edition. Celebrating a decade of GPS Solar technology, this landmark Limited Edition is designed for a new generation of leaders, embodying the pursuit of excellence in both innovation and style. With the strong, sleek lines of the Seiko Astron, the world's first commercially available quartz watch, this remarkable timepiece, available only in a controlled-production run of 1,500, combines solid tailoring with the highest degree of accuracy possible in a wristwatch. GPS controlled for high-speed time and time zone adjustment to 39 time zones, and including a daylight saving time function, perpetual day and date calendar correct to the year 2100, and am/pm indicators, this exceptional watch features a unique time transfer function that allows wearers to switch between the main dial time and the dual time subdial at the push of a button. To ensure smooth operation, the watch is equipped with a signal reception result indicator and power save function. The solar cell is powered by light energy, with no battery change required. With distinctive horizontal patterning to reinforce the solidity of the design, the gray dial, complete with three-dimensional applied indices and LumiBrite hands and markers for superior visibility, is framed by a black sapphire crystal bezel providing subtle dimensionality, shine and enhanced scratch-resistance.