21+ Omega 1861 Movement Accuracy US. Watch omega caliber 1866 speedmaster manual. Submitted 5 years ago by apprehensive_andy.
This is the movement of my omega speedmaster professional ref.
What are your experiences with the speedy's 1861 movement in terms of accuracy and consistency? Omega chronograph movement 861 1861 321 861 sub second hand. Speedmaster 50th anniversary · speedmaster professional. Wavy, low amplitude, beat error could be better.