Rolex Submariner M Spedito con Pacco ordinario extraSubstitution model of The movement is changed to Cal 3130, and stability and maintainability are improved Also a watermark crown mark contains at 6 o'clock on the glass The average sales price for Rolex Reference number M is $9,852The m had the same external features as its predecessor but with the updated caliber 3130 This new caliber was improved with a Breguet overcoil, as well as a full balance bridge which offered a greater degree of stability and shock resistance Rolex Submariner Two Line Dial m Full Set Bulang And Sons 14060m 4 liner