First of the old trucks home

[obby]

Have been unable to locate the chassis number best i can do is a 50c piece size circle with an S stamped sideways into it on the left front chassis behind the wheel , the engine number is R581935.
i have posted another photo of a bracket behind the cab and if you look below the rear window you can just see another clip of some sort , any idea what this may have been for.
Cheers Shaun