Complex sentence: There was also a 12 (30cm) series, issued under the number 74000 and following, which included some operatic titles, though most of the first 100 numbers were dedicated to band music, or to the violinists Kubelik and Franz von Vecsey.
Split into simpler sentences: There was also a 12 (30cm) series, issued under the number 74000 and following. It included some operatic titles, though most of the first 100 numbers were dedicated to band music, or to the work of violinists Kubelik and Franz von Vecsey.