Lenovo 1706B8U Hardware Maintenance Manual page 231

Parts list
Windows Vista Business (32 bit) is preinstalled as the operating system in
following models:
v 7666-34x, 39x, 63x, 26x, 3Ax, 36x, 86x, 47x, 7Mx, 74x, 75x, 76x, 64x, 83x, 53x, 8Bx,
8Cx, 3Cx, 93x
v 7667-34x, 36x
v 7668-79x, 7Ax, 44x, 93x
v 7669-7Dx, 27x, 49x
v 7673-65x, 4Jx, 4Hx, 33x, 34x, 3Hx, 78x, 3Jx, 79x, 4Gx, 25x, 44x, 3Kx, 4Nx, 5Ax
v 7674-65x, 4Nx
v 7675-26x, 33x, 34x, 35x, 49x, 38x, 4Ax, 55x, 3Mx, 4Kx, 7Kx, 59x, 5Ax
v 7676-35x, 58x, 5Ex, 3Lx, 4Px, 3Px, 5Cx
225
ThinkPad X60, X60s, X61, and X61s