I have seen similar to these before on feeBay.
Someone was taking off the paint and/or starting with a brass one and making all the metal look very distressed.
Typically they would make it look like it is 100 years old and in a very aged condition. They typically would do this to inexpensive rollers and TEs from the 70's, 80's, and 90,s. It is not the sort of trickery I condone. A friend got taken for $500 on ebay for one these phony aged beasts.
That said, yours looks better than the others I have seen.
Gil