Nice used boring head as shown. It has some writing on it near the insert. Note that there is not a specific part # on the boring head but I was able to match up the measurements to the Criterion catalog shown in the last photo. This boring head is very similar to the other 3 Criterion boring heads I have listed so maybe it's just a different generation.
Comes with 3 hex wrenches. Please check out all of the photos so you'll know what to expect.