I doubt the wheel/hub cover could hold that much oil, they pulled the axle bolts. In the first pic, you see what looks like wrench marks. Doubt you need a new seal.

Geoff

1955 2nd Series 3600 235 cid, 4 sp. - Current
1979 Chevy K10 350 cid 4 sp -Sold
1955 2nd Series Wide Window 283 cid 3 sp - Totaled