Pola
The Old Watermill-Operating

16-1/2 x 16 x 15" 42 x 40 x 38cm
Walthers Part # 578-935, p. 89 Walthers 2003 Big Trains Reference
G scale, $249.99, sold out at Walthers

 
A handwheel, two cog wheels and toothed racks operate a sluice gate that can be raised and lowered. Turning waterwheel is driven by a low-speed motor. Accessories include millstones, four sacks, storage loft and wooden bench.