Sold at Auction: A VINTAGE SEIKO BELLMATIC WRISTWATCH; ref. 4006-6031, in stainless steel with dark blue dial, center seconds, day date, alarm functi...
Seiko 1972 Bell-Matic for $550 for sale from a Private Seller on Chrono24
Seiko 4006-6031 (17 Jewel Bell-Matic)... - The Watch Spot
For P.S. -- Seiko 4006-6031 BellMatic Evaluation - YouTube
Beautiful Seiko Automatic Bell Matic 4006 6031 - Etsy