ThinkPad T550 (20CK000DUS) Ultrabook Intel Core i7 5600U (2.60 GHz) 8 GB Memory 256 GB SSD Intel HD Graphics 5500 15.6" FHD Windows 7 Pro 64-Bit downgrade rights in Windows 8.1 Pro 64-Bit - Newegg.com
Lenovo Thinkpad T550 Intel i5 2.3GHz 8GB 500GB UMTS 15.6 Zoll Win11 Pro 1366 S0T | B Ware
Notebook Lenovo Thinkpad T550 Core i5-5200U FULL-HD 2.2GHz 16Gb 500Gb SSD 15.6" Windows 10 Professional - Service re marketing srl.