Glycine Watch Combat Sub 2 Tone. Since the early 60s, Glycine has served the market with this line of sturdy and captivating watches, made for exacting conditions of wear and use. The precise automatic and chronograph movements are housed in a high grade steel case of rugged construction, offering excellent value for money. Combat watches stand out for their classic design, enduring strength and reliability. All through the years, this line of watches has enjoyed unbroken popularity in military and sport circles.