Card Identification Forum

I have the following two cards of Dave Winfield.  They look identical front and back except one says 6/15.  Any idea why they both don't have the /15 format?

The SN is actually from a different series, a Vault series. 
ITG does this with their hockey cards. They either take what they already have or use buybacks and place a stamp on them to be release in a series with a mix of older cards usually. 
What you have in the same card, just released again with a stamp and SN.

I didn't even know that SportKings did buy-backs, vault cards or re-releases! I would say that's a surprise, but it really isn't these days!

Can somebody tell me what year the Sportkings buyback/vault card?  The back says 2012 but that can't be true if it's the vault version.  

Those ITG/Leaf Vault sets are such a cluster f**k as sets. They are released in different vault sets or during the National. We don't include them in the database because there has never been a consistant checklist (outside of the 2015-16 In The Game Final Vault). Some times they include the Vault release year included with the stamp, but looks like your card does not. Without that it is pretty impossible to determine which set it was packed out with.

COMC lists the vault card re-released in 2015.

https://www.comc.com/Cards/MultiSport/2012/Sportkings_Series_E_-_Single_Memorabilia_-_Silver_Jersey_2015_Sport_Kings_Vault/SM-13/Dave_Winfield/10984044

So does all this mean I can or can't add the card to the database?  

As a Vault card, it will not be added to the database.You can add it to your collection through the 2012 Sportkings Series E though. It just wont be marked as being from the 2015 Vault set (thank you SDC for finding the year)

https://www.tradingcarddb.com/Checklist.cfm/sid/116235/2012-Sportkings-Series-E---Single-Memorabilia