Spinnaker Croft Mid-Size Automatic Dolphin Project Limited Edition SP-5177-22 Dolphin Cave — 425 pieces , the rarest colourway in the collection. Miyota 8215 automatic movement (21 jewels, 42h power reserve), 316L stainless steel case 40 mm (14.1 mm thick, 47 mm lug-to-lug), green bezel, green wave-pattern dial with Swiss Super-LumiNova luminescent dolphins, steel bracelet + recycled rPET grey strap, anti-reflective sapphire crystal, screw-down crown, 150 m / 15 ATM water resistance. 10% of net sales donated to Dolphin Project. 2-year warranty.