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This Super-O Boyer watch band is designing for 2009 onward Seiko Tuna models such as SBBN013 or other 21.5mm lug Seiko diver or sport watch case with straight lug. 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 18 buckle width (compatible with original Seiko 18 buckle, if you want to install your original Seiko clasp, please check the size of your Seiko clasp first).The lug of this watch band was tapered into 18mm buckle size, added value on flexibility of using your original 18mm Seiko clasp back if you want. This item includes one pair of FAT spring bar (Generic Seiko Dia. 2.5mm spring bar) to ensure a more secure connection. Here introduce the latest technology of metal coating - "Diamond-like carbon" DLC coating. DLC is very resistant to abrasive and adhesive wear making it suitable for use in wristwatch accessories that may experience extreme contact pressure in rolling or sliding contact. The extreme hardness, wear-resistance, and slickness of DLC coating make it an ideal coating to apply to stainless steel watch bands. Accompany with V-Clasp double lock buttoned diver's clasp. V-Clasp was made from solid 316L stainless steel with extra 6 micro holes for flexible fine tune length adjustment. Featured in V shape safety lock, streamlined form & chamfer edged design to giving a more massive look. Chamfer double locks diver's buckle is ideal for watch band with thickness approximate 4.0 - 5.0mm thickness. Today replaces your Seiko Tuna into this unique aftermarket watch band.

Watch Bands Lookbook demo watches by Strapcode: Seiko Prospex 1978 Quartz Saturation Diver's Re-creation Limited Edition S23627J1, Seiko Marine Master Professional 1000M SBBN029
All compatible model numbers:

Seiko Tuna wtih 21.5mm lug watches
- SBBN013, SBBN023, SBBN029, SBBN039
- SBDB009
- SBEP011
- SHC067
- SNE497, SNE498, SNE499
- S23626, S23627, SR920SW-BK, SR920SW-BL
- SRPA82, SRPA83, SRPA99
- SRPD14
Item number: SS211820BLC044
Brand name: MiLTAT
Collection: Super-O Boyer
Lug width (mm): 21.5
Buckle size (mm): 18
Buckle Include: Yes
Buckle type / Buckle Finish: 316L Stainless Steel Solid V-Clasp Double Lock Buttoned Diver Clasp, Diamond-like Carbon (DLC Black)
Overall Length (mm): approx. 185
Thickness (mm): 3.2
Spring bar hole dia. (mm): 2.50
Material: 316L Stainless Steel, all solid links include end links
Color / Finish: Diamond-like Carbon (DLC coating)
Max. length (mm): approx. 185
Corresponding Min. length (mm): approx. 110
Net Weight (gram): approx. 97
Lug end style: Curved End
Adjustment type: 8 Screw fixed links & 6 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:
- 037 Flat-head Small Screwdriver
- 036 Straight-end Flat-head Watchmaker Small Screwdriver
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Seiko Tuna wtih 21.5mm lug watches

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for Seiko MarineMaster (Tuna)

21.5mm Super-O Boyer Watch Band compatible with Seiko Tuna SBBN013, Diamond-like Carbon (DLC coating) 316L Stainless Steel V-Clasp