That is not a fake. That is a poorly struck 6 that looks like a 3. I have owned a few of them through the years and saw a few more. The under barrel marking is 1906, a triangle, and a 2 digit date.
I whole Heartedly Agree!
When the Pic is blown up and focused closer, it's amazing how evident it becomes!
The numerals, aren't even closely matched, between a 3, and a 6!