The Seiko Prospex Alpinist SPB435J1 is a must - have for watch enthusiasts and nature lovers. Whether you're hiking in the mountains or attending a formal event, this watch is a perfect companion. With a diameter of 38mm, thickness of 12.9mm, length of 46.2mm and weighing just 0.146kg, it's comfortable to wear all day. It's a limited - edition piece with a unique Save the Forest Bamboo Grove Thailand design, released on January 24, 2024.