![Bow :bow:](./images/smilies/buga.gif)
The orange one is a 120 Mk.II or possibly a Mk.IIA. Either way it would be fitted with either a Ford 365 or a Perkins 6-354 engine.
The Mk.IIs were fitted with Hamworthy pumps and valve blocks but the later Mk.IIA was fitted with Commercial pumps and valves like the 120 Mk. III in the second pic.
The MK.IIA was in fact a MK.III in MK.II clothing. I ran nine Priestmans including both those models and its good to see there are still some out there.
![Thumb up :thumbup:](./images/smilies/icon_b_thumbup.gif)
Fred