Please identify these HifiBerry boards.

Hello, I'm a tinkerer and found several Rasperry Pi 3's. They had boards attached that are labeled as 'HiFiBerry DAC-SR PCP Release 1.2'

However, No matter what research i do, i cannot find anything about these boards. they look larger than any boards i find online.

Are they custom jobs? Original versions with limited documentations? knock-offs? Any help would be appreciated. 


image upload was very limiting, so i use imgur. 


Thank you to anybody who can help me.


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