Hi, Bee.M There is a Poundland in Witney, so next time I am in the town, I will pay them a visit and see if I can find the air duster. Thanks for the offer Duncan. I have marked the wires with their location numbers, and have pictures so I don't feel I need the wiring diagram. It's definitely an NVR switch Les. It does all the things you list and does'nt run when power is restored. I suspect that you are correct Nick, and this is a customized unit for Myford. Clive, the pt. no. CA10X A401 ties it down to being part of the CA range, not CG. I think the X denotes latching, and A401 implies a 3 pole motor reversing switch. Building one up from scratch is a bit to challeging for me, but I have e mailed a company up north who stock Kraus, to see if they can help. Thanks though Clive for you input, and going to such lengths to help, and everyone who have posted comment Regards Lynne