The Seiko Prospex Mini Turtle SBDY109 is an ideal watch for diving enthusiasts and watch collectors. Whether you're exploring the depths of the ocean or going about your daily life, this watch is a reliable companion. The 200m water resistance allows you to dive with confidence. The mechanical self - winding movement gives it a classic charm. With a horizontal case size of 40.5mm and a thickness of 13.2mm, it fits comfortably on your wrist.