Extractor Fan see photos & Details (Harborne B32)

Hi all, this extractor fan was given to me some years ago as a nearly new spare, at the time I was told it was in working order but never tried it so cannot really say what its condition is so it may be just for parts. It comes without screws or any instructions. I was going to put it in the scrap but thought perhaps it might be useful to someone. Kind regards Eric