The shoe hasn't popped up on any sneaker release date calendars just yet, but it's listed on the webstore of Italian sneaker shop One Block Down, which indicates that a retail launch may be on the way soon. For what it's worth, there's a story floating around on NikeTalk about someone picking up a pair in Korea, so the shoes may be trickling into retailers in certain regions now.
UPDATE 9/13: These Spiridons release on Thursday, Sep. 15, via Nike SNKRS.
Nike Air Zoom Spiridon "Gold"
Release Date: 09/15/16
Color: Black/Metallic Gold
Style #: 849776-770