Thanks Neptune.
Interesting, the pic in the link actually looks like the same model loader/tractor.!
As you say, I'll have to try to catch one of our German friends to see if they can help.
A shame Alexander is not here, I guess he would have known straight away.!

update:-
After checking on a few more leads, I found this:- http://www.panzerbaer.de/helper/bw_pimasch_fag_02-5t-a.htm