I should mention that I'm not on the hunt for that one, it's a photo from the Avemax site, I was using it as a clone perhaps closer to the Bridgeport (other then the drive). I just looked and it's listed as 8 speed step pulley with "Unique design on Hi-Low gear speed commutation".
D
I kinda assumed that. It looks brand new. I guess it is!
I'm thinking there is a gear in the end of the motor or an electrical system to double (or half) the motor speed itself.
Anyway, it's a great example of close but not really.
Below is a photo of my Hartford VS a pulley drive Bridgeport below that. As you can see, it's a much closer clone. But even so there are still some minor differences.