File:Motorola MC68000L8 MACSS processor.jpg

An 8MHz DIP version of a Motorola 68000 processor, like the one used in the first compact Macs such as the Macintosh 128K. Early production runs were marked "MACSS", after the original name of the "Motorola Advanced Computer System on Silicon" project.

Source

 * The 8-bit Legacy: Why They will never die, The CPU Shack Museum. 2010-03-14.