Help needed Seiko 4004 [4004] [0903-8159]. Friend of mine personally bought in 1977. Intermittently runs after new battery. Searching for a video of movement breakdown and cleaning. : r/Seiko
Seiko SQ Quartz 4004 Mens Watch Green Dial Day-date Seiko | Etsy
VINTAGE RARE SPORT BIG JAPAN ST.STEEL MEN'S QUARTZ WATCH "SEIKO" 4004/ 0903-5029 | eBay
Seiko 4004 silver nugget for $293 for sale from a Private Seller on Chrono24