You could just check under Color Lcd mmod and see if it's A019 LG or A022 SamsungMine is fantastic, H series, base model 2.0/8/256, first one I got.
I tried the command to determine display manufacturer, but it just said Color LCD and nothing else at all. So I tried piping ioreg to a file, using TextWrangler grep to remove everything thats not hex code between angle brackets, and xxding the result, but a bunch of gibberish came out.
It's supposed to tell you the week it was manufactured. There's a theory out there that newer versions (with 5th digits being N or greater on the alphabet list) have less problems...No yellow tinting here. I adore this screen. I've had 0 issues with it.
Not sure what the fifth letter of my serial number is supposed to tell you though.