version of ps2?

[Warlock]

Yep, shadowknyght is correct. Here is a list of PS2 versions.Version 1 - SCPH-30001, 10 screws on bottom of case, serial no. starts with "U1"
Version 2 - SCPH-30001, 10 screws on bottom of case, serial no. starts with "U0"
Version 3 - SCPH-30001, 10 screws on bottom of case, serial no. starts with "U2"
Version 4 - SCPH-30000, 30001, 35001, 30002, 35002, 30003, 35003, 30004, or 35004, 8 screws on bottom of case
Version 5 - SCPH-30000R, 30001R, 30002R, 30003R, 30004R, or 30006R. Also, some SCPH-30000, 30001, 30002, 30003, and 30004 models have a V5/V6
Version 5 & 6 - the difference between these two versions illustrated
Version 7 - SCPH-39000, 39001, 39002, 39003, 39004, 39008 or 37000
Version 8 - Only in Japanese consoles. SCPH-39000, or, SCPH-39006 (GH-022 BIOS 090)
Version 9 - if you have SCPH-50000, 50001, 50002, 50003, 50004, 50006, or 50007 you have a v9 or v10 board.
Version 10 - SCPH-5000x, with date code "3D" to the right and below the serial number on the back of the console. (GH-026 board)