IC-PWM CONTROL CKT NTE IC, Type: PWM Control Circuit, Package: 16 Pin DIP
The part was an NTE substitute and was the correct part. However, $10 to ship two transistors and an IC was not only more costly than the parts total but unreasonable considering the short distance of shipping to my address.
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I have used MCM for many years and would give high recommendation for getting the job done right.