Singer Instrumentation 1-500783-309 Instruction Manual for Sweep Oscillator Model 6606

-In Model 6608EDA For Use With Serial Number 101 and above  Condition: UsedThis item has been inspected and it is in good condition.

l 6615ED, Spec. 2055 For Use with 6600, Spec. 2053 Mainframe  Condition: UsedThis item has been inspected and it is in good condition.

Singer Instrumentation 110-6024 Sweep Oscillators Model 6610E Series Instruction Manual  Condition: UsedThis item has been inspected and it is in good condition.</

Singer Instrumentation 6612C/D Sweep Oscillator Plug-In Instruction Manual Manual Part Number: 1-500783-319  Condition: UsedThis item has been inspected and it is in good condition.

and 9515C Oscillator  Condition: UsedThis item has been inspected and it is in good condition.