Dear Mr H.
I have seen this item many times in the past. It was either in your boat or it was seen sneaking around in your box of tricks.
It is a single Rx controlled switch manufactured by a small business in the West Country - Mole Technology The guy passed away many years ago if I remember).
Merry Christmas to everybody, hope see you all in the New Year.
Graham Sheppard
I've had this for ages, but I don't know what it is, what it does or what it's for...anybody recognise it?
Rich