E: XCGPU and Date
Octal's Xbox 360 Identification Wizard
CORONA
12V 9.6A
RGH1.2 or RGH3
WINCHESTER
12V 9.6A
NOT RGH-able
If your console was made after 8/14/2014, it is PROBABLY a Winchester. You can take off the side panel and look in to see. Note the IHS and the position of the crystal below.