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Seiko Prospex Baby Tuna Automatic SRP637 and SRP641

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Seiko Prospex Baby Tuna Automatic SRP637

A new Baby Tuna has been added to the core line up of Seiko's newly globally launched Prospex series!  The SRP637 is the featured model today, but there will actually be two styles to choose from.  The SRP637 is a stainless steel case, bracelet and shroud that measures out at 46.5mm wide.  The piece has a 60 minute uni-directional rotating bezel.

Seiko Prospex Baby Tuna Automatic SRP637

The shroud on this model, unlike last years LE baby tuna, is also in stainless steel as I previously mentioned.  The crown is located at the 4:00 position, in order to eliminate the possibility of interfering with your wrist.

Seiko Prospex Baby Tuna Automatic SRP637

The steel bracelet will use a pin and collar system for sizing, and has plenty of micro adjustments on the clasp.  There is also a folding expansion for the clasp in order to add length for going over a wet suit.

Seiko Prospex Baby Tuna Automatic SRP637

The movement used is Seiko's self-winding 4R36 automatic, with 21,600 bph, 24 jewels, a 41 hour power reserve, and both hack and hand wind feature.  This will have a closed case back but does of course have 200m water resistance. 

Seiko Prospex Baby Tuna Automatic SRP637

The crystal is Seiko's hardened mineral called Hardlex for shatter resistance.  The Lumibrite luminous is applied heavy to all three hands and all index markers, creating excellent legibility in dark situations. 

Seiko Prospex Baby Tuna Automatic SRP637

The SRP637 and SRP641 are both going to retail for $575 but can be purchased on our site for $431.25 HERE for the SRP637 and HERE for the SRP641.  Both models should be in stock by next week.  

Seiko Prospex Baby Tuna Automatic SRP641

Thanks for reading!

Seiko Prospex Baby Tuna Automatic SRP637

Seiko Prospex Baby Tuna Automatic SRP637

Seiko Prospex Baby Tuna Automatic SRP637

Seiko Prospex Baby Tuna Automatic SRP637

 

  • Seiko
  • Prospex
  • Baby
  • Tuna
  • Shroud
  • Monster
  • SRP637
  • SRP641
  • Automatic
  • 4R36
  • for sale
  • review
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