This video details the servicing of an AS 1900/01 Watch movement with a calendar mechanism.Mark LovickRelated postsSeiko Kinetic watch repairs.June 6, 2011Bonus Ep.4 Fitting A Mineral GlassMarch 28, 2019Hamilton Watch Repair – Valjoux 7750March 14, 2012 (Cancel Reply)You must be logged in to post a comment.Previous postAutomatic Rotor Bearing Replacement for Valjoux 7750 and ETA 2892-A2Next postRotor Bearing Replacement – ETA 2824