This is the larger crank that has a pretty good size knob and is ribbed on the front side. The smooth crank is for the small neptune and Smithway pumps. thank you
Thank you Ron Scobie, and thank you dave for the photo. Sorry about the delay, the other sites I belong to won't allow posts to ads so I have to get used to checking my ad here. I still would buy another if someone has an original for sale. Larry