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    Home / All Products / 20mm Super-O Boyer Watch Band compatible with Seiko SPB143 63Mas 40.5mm, 316L Stainless Steel Brushed Wetsuit Ratchet Buckle
    20mm Super-O Boyer 316L Stainless Steel Watch Band for Seiko SPB143 63Mas 40.5mm, Brushed Wetsuit Ratchet Buckle Strapcode Watch Bands
    20mm Super-O Boyer 316L Stainless Steel Watch Band for Seiko SPB143 63Mas 40.5mm, Brushed Wetsuit Ratchet Buckle Strapcode Watch Bands
    20mm Super-O Boyer 316L Stainless Steel Watch Band for Seiko SPB143 63Mas 40.5mm, Brushed Wetsuit Ratchet Buckle Strapcode Watch Bands
    20mm Super-O Boyer 316L Stainless Steel Watch Band for Seiko SPB143 63Mas 40.5mm, Brushed Wetsuit Ratchet Buckle Strapcode Watch Bands
    20mm Super-O Boyer 316L Stainless Steel Watch Band for Seiko SPB143 63Mas 40.5mm, Brushed Wetsuit Ratchet Buckle Strapcode Watch Bands
    20mm Super-O Boyer 316L Stainless Steel Watch Band for Seiko SPB143 63Mas 40.5mm, Brushed Wetsuit Ratchet Buckle Strapcode Watch Bands

    SS201817B121

    20mm Super-O Boyer Watch Band compatible with Seiko SPB143 63Mas 40.5mm, 316L Stainless Steel Brushed Wetsuit Ratchet Buckle

    $114.99
    • This Super-O Boyer watch band with a curved solid end pieces perfectly fit SEI 63Mas - SEI Prospex SPB143, SPB145, SPB147, SPB149 with Dia. 40.5mm, the interpretations of SEI's First 62MAS models. Super-O Boyer watch band is a new breakthrough of our O Boyer Collection. Same as O Boyer, this Super-O Boyer composed of 3 flat and solid 316L stainless steel units plus highlighted 3D effect curved solid end pieces. This well-built replacement bracelet was assembled by screw-in adjustable details instead of flimsy pressure pins. Watch band is tapering to 18mm buckle width. (Compatible with original SEI 18mm buckle, if you want to install your original SEI clasp, please checks the size of your SEI clasp first.) This item includes one pair of FAT spring bar (Generic SEI Dia. 2.0mm spring bar) to ensure a more secure connection. Accompany with ratchet buckle clasp which is an ideal wetsuit watch band buckle. The ratchet theory extension mechanism is of great importance for both convenience and safety. Another awesome aftermarket stainless steel watch band for 63MAS Dia. 40.5, 62MAS-inspired Prospex SPB line 200m models. Today replaces your SEI watch into this unique aftermarket bracelet.

      Watch Bands Lookbook demo watches by Strapcode: SEI SPB147 Prospex Diver 62MAS Reissue Black Dial

    • All compatible model numbers:

      • Seiko 63Mas 40.5mm models SPB143, SPB145, SPB147, SPB149
      • SPB213, SPB239, SPB253, SPB297
      • SBDC101, SBDC103, SBDC105, SBDC107
      • SBDC139, SBDC141, SBDC153
    • Item number: SS201817B121
      Brand Name: Super-O Boyer
      Lug width (mm): 20
      Buckle size (mm): 18
      Buckle Include: Yes
      Buckle type / Buckle Finish: 316L Stainless Steel Button Control Diver Clasp, Wetsuit Ratchet Buckle, Brushed
      Overall Length (mm): approx. 190
      Thickness (mm): 3.2
      Spring bar hole dia. (mm): 2.00
      Material: 316L Stainless Steel, all solid links include end links
      Color / Finish: Brushed
      Max. length (mm): approx. 190
      Corresponding Min. length (mm): approx. 120
      Net Weight (gram): approx. 104
      Lug end style: Curved End
      Adjustment type: 6 Screw fixed links & no micro holes on clasp

      Remarks: All Pictures shown are for illustration purpose only. Actual product may vary due to product enhancement such as colors and logos.

      We recommend using a 1.8mm slotted blade screwdriver for sizing this watch band:

    • International Shipping

      At Strapcode, we are committed to providing a smooth and hassle-free international shipping experience for our customers, we partner with reliable shipping services, including FedEx and other reputable carriers, for express delivery of your orders overseas.

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      Free Shipping Option

      To determine if your order qualifies for free shipping, please refer to our detailed shipping policy HERE, to take advantage of this cost-saving opportunity of having your items delivered to your doorstep.

      Final Shipping Cost

      Please note that the final shipping cost will be calculated and displayed during the checkout process before making a payment.

    Type: Metal