Looks like Vlad the Impaler sporting a turban. Very cool find, at about a tenth of the price that pipe would fetch from an online retailer. Pic #2 shows that it was never smoked. Pic #3 shows it's not unsmoked anymore.
Keep it clean internally, and do NOT allow any cake to build, and it will serve you many years.
Looks like the knurled piece is the shank extension. It might be several pieces. Don't unscrew those unless you're doing a deep cleaning. The extension either screws in the bowl, or has a push-pull. Same for the stem. Twist clockwise and pull out. Never counter-clockwise. If it doesn't turn clockwisewith ease, then it's a screw in .... and those should be taken apart sparringly.