This class was a right of passage for all Enron employees, whether you were a Schedular, Accountant, aspiring Trader, Analyst, or Entry Level college hire, we all took this class.  These were made from training material, and professionally bound.  

In 2023 I continue to use this for training new employees into the energy industry, and it is as relevant today as it was 20 years ago, this does not seem antiquated in any way (except that the gas wells are fracked instead of conventional drilling), but the wellhead part is really basic anyway since the idea was how the gas moves through the processing and pipeline systems.  

These copies were made around 20 years ago,  but are still all in clean new shape.