Is This Zululand Stamp A Fake?

Hi all - I have not posted on the forum for some years but am still active. I keep thinking, "I should go on the forum about that . . ." and now is a good time to ask a question. This stamp appears to be from Zululand, but no such stamp exists in Scott. It appears to be a legit UK 1 1/2d stamp, Scott no.112. The cancel looks like it might be British; I could not find Zululand cancel examples like it. I'm thinking it must be a fake. I think the overprint may have been applied over the cancel but not sure. Anyone seen one like it?

Fake stamp , never issued with that overprint.
wrong type set "u" too wide ,"D" is too fat ,looks more like a "O"