Description: Apple II Plus: How to Identify a Revision 7 Motherboard? Header: Apple II Plus: How to Identify a Revision 7 Motherboard? This article last reviewed: 19 November 1987 Here's how to determine whether an Apple II Plus has a revision 7 motherboard or a pre-revision 7 motherboard: - Look at the motherboard's part number. As you face the front of the computer, it's in the upper-left corner of the motherboard. The number begins with nnn-nnnn. - If the part number ends with 07, or with A, B, or C -- the motherboard is revision 7. Otherwise, it's pre-revision 7. Keywords: