1947-
Phone alarm for fire in a PD
E45, E88
L58
BC20
1948-
Assign Specific Unit
SQ 61
1949-
10-30 loading up the box
E64
R3
SQ41
1949-
Assign First Due
L41
1950-
10-75
L47F
BC18
DC7
1951-
2nd Alarm
E82, E46, E97, E72T
L38, L31
BC3
CT1, FC1, RB1, SB1, ST1, TS1
1953-
Assign Specific Unit
E90...