I don't think my hubs have any seal? I also noticed that they only have one bearing per hub. Most of the new ones comes with a seal and two bearings. See photos of all the component to my hub assembly at the following thread.
There is a washer that presses against the spindle end.
http://forums.iboats.com/showthread.php?t=326235
There is a washer that presses against the spindle end.
http://forums.iboats.com/showthread.php?t=326235