One of my earliest laptops is this IBM ThinkPad 755Cs dating back to 1994. According to the website ThinkWiki this model came with a colour display, either a 486 DX2 50 or DX4 75 Mhz processor, 4 MB RAM, 1 MB Western Digital WD90C24 video, Cirrus Logic CS4248 for audio, and a choice of a 170, 340, or 540 MB hard disk drive.
This particular one was maxed out with the DX4 processor and 540 MB drive, so it fetched some decent coin when new. It had also been upgraded to 20 MB RAM at some point.