IBM 1620 Manual page 69

+5
1 T Th
Incr
Incr
+5
Boe 2
T4D7 or
T4D15
Units
Carry
+5
Boe 4
Decr
+5
Switch Tho
T4D7 or
T4D15
Incr Decr
+5
e
Bit
Ten Thousand
01.55.45.1
Units
-5
1 T Th
T Th is
Write Sam
2nd 13
Exp Add
R5D6
+5
1 T Th
Decr