Seiko 5 Sports Military Automatic SNZG09K1-var-NATO8 100M Men's Watch An absolutely fantastic timepiece, the Seiko 5 Sports Military Automatic is an entry level piece in the world of mechanical watches; its workhorse 7S36 movement and stainless steel built making it tough as a nail and fit for any place where others might just give away. Fully serviceable, it proves a fantastic addition to any new or old school watch collection.