its amazing how things happen in life..Jerry!
I just was putting two of them all back together using the PN's AK gave me, mine are ALL the Outer: SKF 50x72x8 HMSA10RG part numbers. inner and outer, for front and back.
The numbers I listed before are what AK told me they were.
I have just finished doing my seals and was about to report back to this site when your text showed up !
I checked your previous part numbers and compared them to my shaft dia's.
Guess what....mine are different to yours !
my inner is 55mm inside, 72mm outside and 10 mm thick
my outer is 55mm inside , 72mm 0utside and 8 mm thick
I have gone for the single lip and not double lip.
after removing the old seals and before fitting the new ones i assembled the whole lot to check for bearing fit
ran as sweet as a nut with no shaft play so mi guess mine were set up correctly.
Jerry