This “Bell” means Business... Produced for less than a year in '67, this JDM Seiko 4006-7010 is about the finest example I've ever seen. : r/Seiko
Seiko Bell-Matic 4006-7000 (7030 T) .... the forgotten Business Bell | The Watch Site
SEIKO BUSINESS BELL MATIC 4006 7010 JDM 27 JEWELS 1967 VERY EXCLUSIVE THE GRIAL | eBay
Seiko Bell Matic for $2,500 for sale from a Private Seller on Chrono24
Seiko Bell-Matic 4006-6000 Alarm Cushion Case Bellmatic Business Bell | eBay
Thomas' Timepieces - A very special Seiko Bell-matic for this Tuesday - the Business Bell. This model was introduced mid 1967 and was discontinued after only a few months. It was targeted
Vintage SEIKO Automatic Watch/ BUSINESS BELL 4006-7010 SS 27J 1967 For Repair | WatchCharts
Seiko Bell Matic for $1,392 for sale from a Private Seller on Chrono24
A complete buyers guide to the Seiko Bell-matic alarm watch