Thanks for the responses and to Al for explaining the GT41/43 along with images
of the same, it certainly looked like an impressive bit of kit for the time.
On the fiche front I have had a number of responses to take them, so now have
to sort out the details with those involved, the 'Dalby Datomuseum' being the
first to reply, with two reserves in hand.
So I am sorry if you missed the post, but need to advise you not to reply in
order to save everyone's time.
Hopefully I will find more stuff as I clear out!
Regards Mike Norris