IBM - 12P3728 - Motherboard 600MHz ThinkPad 12P3728 - IBM - ThinkPad System Board 600MHz $153.44 $124.75
IBM - 12P3472 - Motherboard 600MHz ThinkPad X20 12P3472 - IBM - 600MHz System Board for ThinkPad X20 $664.65 $540.37