Seiko 4006-6031 (17 Jewel Bell-Matic)... - The Watch Spot
Seiko Bell-Matic day date - Ref. 4006-6031 Alarm - Catawiki
Sold at Auction: A VINTAGE SEIKO BELLMATIC WRISTWATCH; ref. 4006-6031, in stainless steel with dark blue dial, center seconds, day date, alarm functi...