rms a dev on IRC, has released quite a handy app, that will help in identifying your console, here is what it gives you:

PS3 System Target ID
PS3 Motherboard Revision
PS3 BD-Laser Revision

Which in return gives you which PS3 Model you have, it works on 3.41 using a dongle and works on 3.55 with GeoHot’s CFW and kmeaw’s CFW, here are a few images:

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