AI Summary

At Madison Square Garden on November 9, 2017, G‑Shock founder Kikuo Ibe unveiled three sapphire‑crystal prototype watches at the G‑Shock 35th Anniversary Celebration. The prototypes came in clear, ruby, and sapphire‑blue variants. Because machining sapphire was difficult at the time, each watch required more than a month to produce. The event highlighted the brand’s commitment to pushing the limits of watchmaking technology.

AI summaries can be wrong sometimes—always verify important details using the source article.