Early 1990's "Coronet" 15w outdoor festoon lights

I'd been trying to get a set of these for some years now as they are quite sought after and usually sell for about 30 - 60 quid! I found these on Ebay for just a tenner and surprisingly I wasn't outbid. The string was a bit neglected and dirty when it arrived, but having cleaned it up and fitted a plug, surprisingly most of the lamps still worked (they take 15w E14 pygmy lamps). Despite a few rusty screws and discoloured lantern covers, I plan to use it this year.