Long Nguyễn Thanh on Instagram: "Seiko Sportsmatic Silverwave Water 30 proof Diashock 17 jewels / case no.4400950 , made in Japan. All original parts with good condition. OH already ( serviced ).
Iwan on Instagram: "' Silver Wave ' - Seiko Sportsmatic Ref'697990 - Automatic Cal'2451 JDM - Good Condition - Good Working - Very Nice Aging Tropical Dial - Circa Maret 1961 -
Birthday Watch September 1964! Seiko Sportsmatic Silverwave 2451 / 697 – Altimate Group