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Bonhams : Seiko. A Stainless Steel Automatic Calendar Bull's Head Chronograph Bracelet Watch, Ref.6138-0040, No.781225
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Mens Seiko 5 Sports 6138-0049 Bullhead Chronograph Automatic 1970s RA373 For Sale at 1stDibs | seiko bullhead 6138, seiko 5 chronograph automatic, seiko bullhead chronograph
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New Bullhead project from spanish Seiko forum clubokies made by Grupo Gamma | WatchUSeek Watch Forums
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Mens Seiko 5 Sports 6138-0049 Bullhead Chronograph Automatic 1970s RA372 For Sale at 1stDibs | seiko 5 chronograph automatic, bullhead seiko, seiko 5 sports speedtimer
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Seiko Vintage Men's Watch 6138 0040 Black / Blue Version ... for $661 for sale from a Private Seller on Chrono24
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