250 Watt Solon soldering Iron.
Blimey, you could do chassis repairs with that monster!
Tim, funny you should say that as back in 1979 my Scimitar GTE fuel tank sprung a leak, so I dropped it and repaired it with that iron and a little dab of BICC Coraline Flux always worked wonders with the stick solder.
I won it from work as I used it to strip and tin Litz wire which as you probably know is notoriously tricky to do successfully, happy days in a previous life on TX Stations..