Very cool!
When I was first setting up shop w/ OWWM, I seriously considered going that route. The machines were originally line shaft driven, although the one you posted has been upfitted w/ a modern electric motor, (looks like it used the original leather belts though).
I had the pleasure of seeing one in action once - but there is a reason woodworking was considered dangerous back in the day....being line shaft driven, you have a wide slapping leather belt that came down basicaly right into the "middle" of the assembly, and "originally" having only one drive pully, every blade turns at once! Dont sneeze - you might loose an arm!