Additional accessories for the Seiko MarineMaster 300, including a genuine ratcheting clasp and a sold-out Crafter Blue Orange Curved-End Strap.

• Material1: Genuine Seiko
• Clasp Type: Ratcheting Clasp
• Strap Length: 7–7.25 inches for wrists

This Seiko Marinemaster MM300 is a first version model featuring 'Marinemaster' on the dial and without 'X' on the crown. It has hand-applied lume and was purchased from an original owner who had it serviced.

• Condition: Great condition for its age with normal wear and tear, minor scratches, and small lug damage
• Age since serviced: 1 year
• Bracelet condition: Shows signs of use
• Strap condition: Unused

This Seiko Marinemaster MM300 features a dial with 'Marinemaster' instead of 'X', without the 'X' on the crown, and hand-applied lume. It was purchased from an original owner who had it serviced before selling.

• Condition: Pre-owned, with normal wear and tear
• Bracelet condition: Steel bracelet shows signs of use
• Strap condition: Rubber diving strap is unused
• Crystal condition: A few very small scratches

Up for sale is a Seiko OEM Marinemaster MM300 stainless steel ratcheting clasp.

• Condition: Minimal hairline scratches

This Seiko Marinemaster MM300 is the first version with 'Marinemaster' on the dial and without 'X' on the crown. It features hand-applied lume and was purchased from an original owner in 2023.

• Condition: Used, overall great condition for its age with signs of normal wear and tear
• Bracelet condition: showing signs of use
• Strap condition: appears to be unused
• Crystal condition: a few very small scratches visible with right lighting

The SBDX023 is a modern iteration of the legendary MM300, powered by the workhorse 8L35 movement and built like a tank.

• Condition: Fantastic condition
• Movement: Automatic w/ manual winding - Caliber 8L35
• Case material: Stainless steel
• Bracelet material: Diashield coated stainless steel