PS4 goes grey to celebrate 20 years of the Sony PlayStation - CNET
PlayStation Turns 20, PS4 20th Anniversary Edition Revealed – PlayStation .Blog
Sony PlayStation 4 - 20th Anniversary Edition - game console - 500 GB HDD - original gray - with PlayStation Camera - Walmart.com
Sony PlayStation 4 20th Anniversary Edition Gray Console for sale online | eBay
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20th Anniversary Limited Edition PlayStation 4 - Video - CNET