We are the pioneer for the development and production of highest quality SEIKO mod parts. We are always innovating and pushing the limits of dial production. Using only 100% Swiss Super-LumiNova® luminous pigments. ISO 9001 Certified.
We are the pioneer for the development and production of highest quality SEIKO mod parts. We are always innovating and pushing the limits of dial production. Using only 100% Swiss Super-LumiNova® luminous pigments. ISO 9001 Certified.
At a sweet spot of 38mm, a vintage styled speedmaster chronograph matt black dial with Swiss Super-LumiNova Old Radium on the hour markers and hands.
With tachymetre engraved onto the brushed bezel and a sapphire caseback, giving you a full admiration and beauty of the entire caliber running.
ABOUT THE MOVEMENT The ST1901 Chronograph movement is a hand winding mechanical caliber made from the 1960s to this very day. This is a testament to one of the oldest and most reliable workhorse chronograph movement to exist.
The official accuracy of ST1901 is rated to be -10 to +40 seconds per day. However, across 30 pieces we tested (dial up) had between -1 to +8 seconds per day. **Of course not every pieces will have such high accuracy.
