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) at Amazon.com
Komputerbay 2GB DDR2 667MHz PC2-5300 PC2-5400 DDR2 667 (200 PIN) SODIMM Laptop Memory - Komputer Bay
Part 2, retro Thinkpad X61 arrived today 😊😇. : r/thinkpad
LENOVO IBM THINKPAD X61 12.1" INTEL CORE 2 DUO L7500| 4GB RAM| 500GB HDD T12-B14 | eBay
Amazon.com: Lenovo T530 15.6 Inch Business Laptop NoteBook Intel Quad Core i5-3320M 8GB Ram 500GB Hard Drive WIFI Windows 10 Pro (Renewed) : Electronics