There were originally two variations listed of the red 3rd issue Players Club where the photo rectangle was a different shape on the two cards. The barcodes were different sizes as well.

First card had a player photo rectangle that was wider than it was tall and had a narrow (26mm wide) barcode with an 8 digit player number

The new found card has a photo rectangle that was taller than it was wide and still has the narrow (26mm wide) barcode

And the last variation has the same taller than wide photo rectangle but has a wider (38mm wide) barcode that has 10 characters in the printed player number.

Here's scans of the three variations.. (some backs have mag stripes and some don't)