I am not 100 sure about what you mean about numbs, but if you mean smallar thread pick, rather then difficult these are time consuming (in relative terms as these women can hand sew faster the i can type). The straightness and frequency of the hand pick shows the skills. The ticker thread some time used on the front shoulder/yoke, that is just a stylistic choice. Again, the number of hand steps, adding the side seams and hems, should had around 20-30 euro more to the cost of a shirt... Again most shirtmakers may use the same group of home seamstress for hand sewing, so the quality is relative. Does Anna Matuozzo do everything herself? I doubt it.