In This is Gyachung, Chris Dahlman unveils the fascinating story of a rare and storied Seiko watch. Through the dramatic story of the 1964 Japanese Himalayan Expedition to the fabled Gyachung Kang mountain, Dahlman presents the lost history of Seiko's first professional mountaineer's watch. As the men whose challenge for glory took them to this savage and extraordinary mountain, the mystery surrounding this watch comes to light. The 1964 expedition was the first time Seiko purposefully designed and built a mountaineering watch. The expedition was documented fully and Dahlman has uncovered a treasure trove of photos that he shares throughout the book. Woven into the tapestry of the expedition that he spins are also traditional Japanese art collaborations, depicting more of the tale. Tying together the incredible photos and art, Dahlman uses eyewitness accounts from the expedition from the men who made the trek to the world's fifteenth tallest summit. From the adventures of the mountaineers to the genius of the Seiko engineers and their watch, this is a dramatic tale of dering-do and technological advancement set on the backdrop of one of the most inspiring and difficult peaks in the world. Full of Japanese history, watch culture, mountaineering insights, and epic stories, This is Gyachung captures the spirit of 1960s adventure while introducing the lost history of this famous Seiko expedition watch for the first time.