My apologies for not posting about this several years ago. When Stuart Kendall put the Vapalux business up for sale he had a clear-out of obsolete parts. They found 5 chrome-plated tanks and 2 silver-painted tanks thought to be from the 1960s. The works assembled new M320 lanterns from the parts. They were then sold on eBay in April 2009. Three chrome and one silver went to a buyer in South Korea, the rest ended up in my loft. One chrome one belongs to my grandson. The other two have now also departed via eBay, both to a collector in Japan.