Seiko “Crescent Moon” Le Vent 1F20-5J60Model: Seiko Crescent Moon Le Vent 1F20 5J60 Year: August 1990 Features: The Design. The 1F20 5J60 was the first Seiko designed by a woman. Sayoko Yamaguchi, an internationally renowned Japanese model and actress, was commissioned by Seiko in the 90s to work on a collection specifically designed for women, by women. The resulting watches were released under the Le Vent brand, and the collection later featured contributions from other Japanese fashion