Quite right, a XK140, The 150 had a curved windscreen and a wider grille, I don't recall the 120 having the additional vents.
Have:
3 (4 tomorrow) 3.4's
Mk-VII Roadster
XJ-6 S-2
new S 4.0L
HAD"
XK-120
XK140
E's S-1 & 2
MK-VIII The one in Hitchcock's VERETIGO
Mk-II
Mk-X
420G