Might be helpful to state what the issue is you're looking for a solution to? And are you referring to the Seamaster 300m or the Speedmaster? There is no such thing as a Speedmaster 300m?
I have a problem with my VS factory V3 Seamaster "No time to die" , the crown and/or tube threading seams to be damaged or worn out. Anybody knows if this case would take an gen tube and crown? thx