Hardlex crystal type 2
Part Number: 320W10GN00
Material: Mineral Glass
NAOMI UEMURA
Japanese Explorer
According to multiple sources, Uemura was initially equipped with a Rolex Explorer II (Ref. 1655), gifted to him by Rolex Japan after he received the Explorer Award in 1976. He wore this watch on his 1978 North Pole expedition.
The extreme Arctic conditions caused issues:
I). He first feared frostbite from the cold metal of the steel bracelet touching his skin.
II). He switched the watch to a leather strap, but it broke due to the vibrations from sledding.
III). He then wore the watch on his waist, away from body heat.
IV). In this position, the lubricants in the movement froze, causing the Rolex to stop functioning.
LIFE SAVING REPLACEMENT -
At a supply drop point during the expedition, Uemura encountered Katsuo Sugawara, a journalist from the weekly magazine Bunshun, who was covering his journey. Sugawara offered Uemura his own Seiko 6105-8110, (150-meter water-resistant diver’s watch with an automatic movement.)
Uemura accepted the watch, and it successfully functioned throughout the remainder of the expedition. This event became legendary in horological circles, symbolizing the reliability of Seiko’s engineering under extreme conditions.