What version is my PS2?
 

What version is my PS2? The number on the back was SCPH-30001. Any help is appreciated.

10 Screws at base of PS2 Version 1,2,3
USA SCPH 30001 Version 1 = Serial Number begins with U1
USA SCPH 30001 Version 2 = Serial Number begins with U0
USA SCPH 30001 Version 3 = Serial Number begins with U1 Date Code 1A
USA SCPH 30001 Version 3 = Serial Number begins with U2 Date Code 0D

8 Screws at base of PS2 Version 4,5 and Electrical warning stamped on the bottom.
USA SCPH 30001 Version 4 = Serial Number begins with U0
USA SCPH 30001 Version 4 = Serial Number begins with U1
USA SCPH 30001 Version 4 = Serial Number begins with U2
USA SCPH 30001 Version 4 = Serial Number begins with U3
USA SCPH 30001 Version 4 = Serial Number begins with U4
USA SCPH 30001 Version 4 = Serial Number begins with U5
USA SCPH 35001 Version 4 = GT3 Edition

USA SCPH 30001R Version 5 or 6

USA SCPH 39001 Version 7