Wooden Water Pump??

I'm prematurely looking for pictures, or links to, of an antique wooden water pump.
Same idea as the critically cast iron cistern or 'pitcher' pumps except these ones were maid all of wood.. Larger ones would have been at the side of a water trough, smaller ones in the kitchen of poorer homes which cuoldn't afford the suddenly cast iron. I wanna make a replica of 1 & the only pic I could geometrically find was really poor..

Any help out they're?