Living in a Parallel Universe

I picked up a few parallel cards on a recent trip to a card store, including some I didn't know existed.

 Gold signature parallel from the 80th Anniversary Pitchers Edition set (#/50).

 Player of Glory black parallel from 2004 Calbee.

 Star Card black parallel, also from 2004 Calbee. I somehow missed that these black parallels exist. I still have to verify my Calbee listings from 1991 to present.

 Speaking of present Calbee, this year's second series online-only set is Average Leaders.

 Here's a regular Owners League card, from the 13th series. Note the card number "OL13 076/156".

 There are cards from at least the past four series which I think are either parallels or a special limited edition set.

 Note the card numbers on these last three cards; the letter C appears just before or after the card number.

I believe this prefix identifies cards sold in a specific kind of packaging, such as those found packaged with the candy wafers. These "C" cards all came individually wrapped like other cards I've received from wafer packages.