Scratching my very rusty memory back to caving in Mouldridge Mine in the 1950's, there was a fair bit of machinery installed. I believe after PDMHS explored the mine, when the Society was in it's infancy, arrangements were made to remove the machinery for safety to either the PDMHS site at the Crich Tramway Museum or to Milltown at Ashover. I am sure there was a write up about this but can't remember whereabouts in PDMHS records it is, if I come across it I'll give you details. Perhaps a younger member of PDMHS than myself! would remember this. Failing that, contact the Mining Museum at Matlock Bath for help in identifying the item as it could possibly be part of the machinery which was removed.
I vaguely remember being told that Stan Gee from Northern Opherus took the lead rights out on the mine about that time. I would have to ask some of my old caving mates to confirm this but sadly they're getting dementia also!!!!