A Mechanical Marvel Inspired by the Legendary Spruce Goose. Metal Time, the epitome of precision engineering, is proud to introduce the Celestial Hercules — a self-assembly model paying homage to the iconic Hughes H-4 Hercules, commonly known as the Spruce Goose. Crafted entirely from polished stainless steel, this mechanical masterpiece captures the essence of the legendary aircraft’s remarkable history and unique features.