i have this 4006 bellmatic, everything works as it should very smoothly, date quickset, alarm winding, alarm sound, bezel rotating is butter to set the alarm, excellent time keeping, excellent power reserve, but one thing.. setting the time feels fairly rough, crunchy, grindy..sets fine but just feels a bit hard while turning the stem/crown. Stem/crown are straight, gasket is lubed, stem goes in and out very smooth with the normal effort. Time setting feels the same with movement in the case and outside the case. So i doubt something is pressing against the stem or so.. watch is complete with all its parts including the spring caseback ring. Any help is greatly appreciated..