"In March 1985 Apple introduced the Enhanced IIe. It was identical in every aspect to the original IIe, the only difference being four socketed chips had been changed on the motherboard: 6502, CD and EF ROMs, and the Video ROM. Essentially, the Enhancement was to make the IIe more compatible with the Apple II+ and IIc models.

In January 1987 Apple introduced the Platinum IIe. Changes were mostly cosmetic and superficial, with the biggest difference being that the case color was changed from beige to the then standard platinum/grey color." (photo credit: AppleDesign)

CPU
CPU: SynerTek 65C02
CPU Speed: 1 MHz
FPU: none
Bus Speed: 1 MHz
Data Path: 8 bit
ROM: 16 kB
Onboard RAM: 64 kB
RAM slots: expansion via 1st slot
Maximum RAM: 128 k, with Extended 80 Columns Card
Expansion Slots: 8 proprietary

Video
Max Resolution: 40/80x24 text, 4-bit 40x48, 6 color 140x192, 4-bit 140x192, 1-bit 240x192, 1-bit 560x192

Storage
Floppy Drive: optional

Input/Output
Speaker: mono

Miscellaneous
Codename: LCA
Introduced: March 1985
Terminated: 1993

This byte of Apple's history from Wired's, "30 Years of Apple Products."