Hi. Geoff, I don't have a photo of Ironsides but there are a couple in my album, Ardent and other boats, of Lady of the Lea,and for some reason I can't upload them to this thread at the moment, they show what looks like a modern electric winch, but it does show the position of them, the same place that Ray's photos show.
From the description in my earlier post I would think it is hand operated by a handle on a horizontal shaft at the top of the winch driving the bevel gears that turn the two drums.
Regards Eddie.