Davidt
·The exract tells you what reference your movement and serial number were originally put in.
So for a Speedmaster 321 it confirms whether your movement originally came in a Speedmaster or something else such as a Seamaster chrono. This is useful for checking against possible franken watches. Other sites with serial number charts, even extremely accurate ones such as ilovemyspeedmaster don't confirm what reference it actually came with, just what reference it probably came with based on the likely production date.
So for a Speedmaster 321 it confirms whether your movement originally came in a Speedmaster or something else such as a Seamaster chrono. This is useful for checking against possible franken watches. Other sites with serial number charts, even extremely accurate ones such as ilovemyspeedmaster don't confirm what reference it actually came with, just what reference it probably came with based on the likely production date.
