====== Photos ======

These two cobs are mostly identical except that at several locations, a run of three or more closely spaced single pin notes is changed to two pin notes at half the repetition rate. Cob 1058a with the closely spaced notes is believed to be the earlier of the two.

===== 1058, 1058a =====
{{cobs:1058:1058a_1.jpg }}
{{cobs:1058:1058a_2.jpg|}}
{{cobs:1058:1058a_3.jpg }}
{{cobs:1058:1058a_4.jpg|}}