I have a solid/usable J model tank (incl. chrome cap but no flap or tap) for sale that was in use until 2yrs ago and been stored dry since, the metallic blue paint on the tank is in good condition but not a Kettle colour. Happy to sell for around £200 or if possible exchange/swap for a KLM tank with cash either way depending on condition.
PM me your email address and I'll forward some pictures
Many thanks
Chris