These were featured in CONVOY MAGAZINE #5
The Canadian 4-gal tin was designed as a re-useable having a filler top exactly like the 1 and 2 gal tins (with the addition of a small air vent cap to facilitate pouring as in modern fuel containers)
Only the 1940 tins have the additional wording of "petroleum spirit" etc.
Cheers
Marc
Convoy Magazine for the enthusiast of Canadian heritage MV's and Canadian military history
http://www.geocities.com/convoymagazine
http://www.geocities.com/lga25ubique