Seal Orientation

Professor Fate said
To put it simply, the "hollowed out" side (with the rubber "lip") always faces the lubricant being contained. I.E. the bottom pic faces into the hub.

cudamark said
The photos I see are right and left, not top and bottom, but, whatever......look at the outer metal ring. The rounded edge goes toward the backing plate and the sharp edge toward the bearing.

I have re-checked, and the images on my screen are displayed one above the other, not side-to-side. Thanks to everyone for your helpful responses.