Why no numbering on this APOH Bat Auto?

[Topnotchsy]

Noticed this card on eBay and was surprised it is not numbered. All the other auto'd cards I've seen from the set have been. It can't be an IP auto since the wording on the back says it is autographed. Sweet card...

 

[hofmichael]

Replacement perhaps?

Sent from my VS840 4G using Sports Cards by Freedom Card Board.com