Seiko [6119-8090]. Picked this up recently, needs some TLC but has been keeping excellent time. I threw it on a no name nato strap just to wear it around but I would
Men's Seiko 5 Automatic 21 Jewel Day Date Calendar Watch - Etsy
FS Seiko 6119 8090 for Osaka Expo 1970 - euro 550 | Wrist Sushi - A Japanese Watch Forum
Vintage Seiko 6119-8090 Mens Automatic Watch _2588 | eBay
The Vietnam Seiko MAC-V SOG Operator's watch. | Wrist Sushi - A Japanese Watch Forum
FS Seiko 6119 8090 for Osaka Expo 1970 - euro 550 | Wrist Sushi - A Japanese Watch Forum