For a classic zulu, you need a bit more cant, a bit more shank (the shank and bowl height should be about the same), and the stem should be about as long as the stummel.
The bowl needs slimming down at the top, and the front and back of the bowl need to be less rounded from top to bottom, so there's not as much taper, and the shank needs thickening up and needs to be more oval. The shank should be about 17mm wide where it meets the stem and as wide as the bowl where those two meet, with a nice taper(side to side) between them. There should be a very gradual taper from bowl to button.
The stem should have about as much bend as a prince shape which is very little, just enough to know it's there.
The classic zulu is usually about a group 4 size. I can't tell from the pics what size yours is, so this is just general info.
Overall, yours is a very nice pipe, and you could call it a zulu variant, but if you're going for a classic zulu, then these changes need to be made.
Nice finish on yours too!
Here are some pics of one of my zulus:
Hope all of this helps,
Rad