Proper noun
Wittner (plural Wittners)
A surname from German.
Measuring tempo Electronic metronome, Wittner model A piece of music's tempo is typically written at the start of the score, and in modern Western music is usually indicated in beats per minute (bpm). Source: Internet
Wittner Kinotechnik offers Super 8 made from a batch of Agfa Aviphot 200D which was perforated and slit for Super 8, 8mm and 16mm formats. Source: Internet