Help me identify my motherboard (Already done a forum search :P )

[Stoffer217]

I just purchased a brand new Slim yesterday as I saw the news about the TA-088 mobo. However, while I'm sure it's not the TA-088 as it came bundled (printed on the box) with a year old UMD movie release (Danish stand-up comedy, for those curious).

I am still dead curious to know what motherboard is inside. I can't see any markings inside the UMD tray, but the box label reads:

CEL PSP-2004 PB
220-240V
O E
P-27401022-0
S01-1707521-x

(censored the x, as that last number is used for the warranty in the store I bought it)

Any help is much appreciated!