Seiko Astron SSJ013 Blue Grid GPS Solar Titanium Bulova Open Case Back : Yes

Open Case Back : Yes

Delma Blue Shark III

Time transfer function (Switching between the main-dial and sub-dial)

Clasp: Type Steel pin buckle with diver's extension

Movement: Automatic Three-Hand Date

Seiko Astron SSJ013 Blue Grid GPS Solar Titanium Bulova Open Case Back : YesCaliber Number 3X62 Movement Type GPS solar Precision 15 seconds per month (without receiving a GPS signal and at temperatures between 5C and 35C ) Power reserve Operating for approx. 6 months (when fully charged), power save: approx. 2 years Jewels 10 Case Band Case Material Titanium (super hard coating) Case Size Thickness: 12. 0mm Diameter: 41. 2mm Lug to lug: 48. 6mm Crystal Sapphire crystal Crystal Coating Super clear coating LumiBrite Lumibrite