Rare Apple IIe prototype logic board #90 (of approximately 100 known to be made), known as the 'Super II,' marked on the edge with a 1981 copyright date and part/serial numbers, "SK4501-10, 620-XXXX-." This unreleased prototype predates the release of the retail Apple IIe by two years, developed primarily to stop clone makers from copying Apple's design. The board is marked with the names of designers Walt Broedner and John MacPhee below the Apple Computer, Inc. logo. Several of the chip sockets are unpopulated. Ultimately released as the third model in the Apple II series in January 1983, the Apple IIe was manufactured and sold for nearly 11 years with relatively few changes, giving it the distinction of being the longest-lived computer in Apple's history.
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