… Clock or watch glasses and similar glasses, glasses for non-corrective or corrective spectacles, curved, bent, … optically worked; hollow glass spheres and their segments, for the manufacture of such glasses. …
Explanatory notes
… 70.15 - Clock or watch glasses and similar glasses, glasses for non-corrective or corrective spectacles, curved, bent, … in Parts (A) and (B) are mainly manufactured by the following processes : (1) Glass is blown into a hollow … exceeding 80 cm. This sphere is divided into three or four parts which are in turn cut into small segments by …