John:
Welcome to APUG.
The Beseler 67 series enlargers are good quality enlargers that have served many people well for many years, and remain in production to this date.
I have had mine since I bought it new in the late 1970s

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There are and were a choice of enlarger heads for that series of enlargers. They are all interchangeable on the enlarger chassis'.
A "Beseler 67 Dichro" is most likely a reference to one of the dichroic colour enlarger heads that fit on the 67 chassis. They are designed for colour printing, and are also excellent for variable contrast black and white papers.
The dichroic colour enlarger heads that fit on the 67 chassis can be confusing in one way - there are essentially three types, each of which has a very similar name. The part that is confusing is how they deal with the need for a power supply.
One version has a separate power supply, which unfortunately connects to the enlarger head with what looks like a standard power cord. It isn't - if you plug the power cord from the head into the wall, it will just blow the bulb.
The second version has a separate power supply with a dedicated cord between it and the colour head. Most likely this is the type you have, but it appears you are missing the power supply.
The third version has the power supply built into the head. This is the most recent version, and probably the most desirable.