What POL tin did I buy???

[Jon Skagfeld]

GSW refers to the manufacturer...General Steel Wares, a prolific producer of Canadian war-time materiel.

Some still refer to this type of container container as a "flimsie", which was a one-time use metal can containing vehicle petrol. When you say "flimsie", pretty well everyone knows what you mean since any original flimsies would have had the the top ripped off, contents poured, and the can discarded.

HTH