Komputerbay 2GB RAM Memory for the Lenovo Thinkpad R61 Series, T60 Series, T61 Series, X60 - Komputer Bay
2GB Memory RAM Upgrade for the Lenovo Thinkpad R61 Series T60 Series T61 Series X60 Series and X61 Series Laptops (DDR2-667 PC2-5300 SODIMM) - Walmart.com
X61, still a great writing/ second machine after all these years : r/ thinkpad