Marine Master 300 “MM300” SKX007 Conversion Case – CT724

$80.00

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Marine Master 300 “MM300” SKX007 Conversion Case – CT724

  • The famous limited edition CT710 Monobloc case was an iconic case in the seiko modding space. Since its retirement in 2022, we’ve been working on a new version with a screw down case back and could take OEM and aftermarket MM300 bracelets*. We are excited to release this V2 MM300 SKX007 conversion case into the modding space. Happy Modding!
  • Dimensions:
    • Lug-to-lug: 47.9mm
    • Thickness (w/o case back): 9.5mm
    • Width: 42.2mm
    • Lug Width: 20mm
  • Material – HQ Stainless Steel 316L surgical grade.
  • Finish: Polished on sides and brushed on top of case body.
  • Included FREE with every case – Crystal Gasket, Case Back Gasket, 2 x 20mm Fat Spring Bars, CT208 crown, CT502 stem.
  • Drilled Lugs
  • Water Resistance: This case was tested to 350M during development and subsequent testing of actual production cases – no failures were recorded.
  • Parts:
    • Fits All SKX007 parts excluding bracelets/straps.
    • Bracelets: This case takes OEM and aftermarket MM300 20mm bracelets. We’ve tested with OEM SBDX001/003/005, SBDX and SLA OEM bracelets. We’ve tested with strapcodes MM300 Jubilee and Oyster bracelets.
    • Why does it come with a crown? The CT724 case takes SKX007 crowns – we’ve seen in the market today that some crowns are being produced over the 7mm diameter standard. All of our standard crowns fit as their diameter is 7mm. This includes the CT208, CT209, CT228, CT253, CT272 (not CT243 Big crown). We included a CT208 crown to ensure you have a crown that fits, and as a added bonus.
  • *Bracelets: it’s been reported that strapcode MM300 bracelets do not fit. We tested the case with OEM bracelets and it is perfect. With strapcode bracelets it stands proud of the lugs and the holes do not line up.