This is the gearbox out of my PA, and was removed in the late nineties for an upgrade. If anyone wants further info you can contact me here or by email.
I've discovered that forum emails have not been getting through to me (thanks, David). I've now made a change to my email server, which I hope will cure the problem, and which should take effect from 1.15 today at the latest. If anyone has tried to contact me, please try again this afternoon. Thanks.