PowerBook 520c

The Apple Macintosh PowerBook 520c features a 25 MHz 68LC040 processor, 4 MB or 12 MB of RAM, and a 160 MB, 240 MB, or 320 MB hard drive in a sleek portable case with a 9.5" color dual-scan display.

Source https://everymac.com/systems/apple/powerbook/specs/mac_powerbook520c.html