Here is a strange one. A 2/71 dated Canadian Coleman LP picnic stove. I have never seen this model before, but it is similar to the US 5402...EXCEPT............... Grate is installed from the left side (US is front mounted) Has 4 solid brass posts on all corners. Could this be an owner's add on?...I doubt it. These stoves we not popular and the Cartridges are near impossible to find. Still any information would be appreciated.