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),.., By Hynix - Walmart.com
Tutorial: How to upgrade ram in a T61 Thinkpad - YouTube
T61 - Wiki
Lenovo Thinkpad T61 RAM-Memory (2 Gig) | Replacement Part
IBM Lenovo ThinkPad T61 14"IN LCD T7300 2.00GHz 2GB RAM 80GB HDD Windows XP PRO | eBay
Grade A Lenovo Thinkpad T61 14.1" Standard Refurbished Standard Laptop - Intel Core 2 Duo T7300 2.00GHz, 4GB RAM, SATA 2.5" 120GB HDD, CD-RW, Windows 10 Home 64-Bit - Walmart.com
Lenovo ThinkPad T61 Laptop 2GB RAM, 100GB HD, Windows 7, Used | eBay