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Seiko Bullhead choronograph blue black dial orginal condition for £872 for sale from a Private Seller on Chrono24
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SEIKO BULLHEAD CHRONOGRAPH AUTOMATIC Ref 6138-0040 JAPAN J Automatic Vintage watch Cal. 6138B *** COLLECTORS *** Seiko Vintage watches - Watches83
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The Seiko Bullhead Collectors Guide - The Spring Bar
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Seiko Bullhead Cal 6138 Chronograph Automatic Vintage watch Ref 6138-0040 JAPAN J Seiko Vintage watches - Watches83
1977 Seiko Chronograph Automatic 'Bullhead' reference 6138-0040 – Blue – Vintage Watch Specialist
Seiko Bullhead Chronograph NOS 6138-0040
