No. 138 - Used
on Dial No. 10LA, Marks 234, 235 and 235A in Director areas.
Superseded by Label No. 160A.
No. 138A - Used on Dials No's 8 and 10, Mark 234, 235 and 235A and also
Dials No's 9 and 11 mark 234 in Non-Director areas. Superseded by
Label No. 160B.