Hi, thanks for your replies Wilhelm and Martin.
Wilhelm - I would be pleased if you could send me some pictures of your crane, also some measurements of the jib. I have sent you a P.M. with address
Martin - I'm fairly sure that is the Model Slipway 1/32 item. Didn't Gzregorz make a wonderful job of building it. Now if only I could get a drawing ...................
Best Wishes
Douglas