Vintage DB Oil 5 gallon can from Denwerks.  It’s empty.  D-B is Bardahl, which is still around today.  The founder was an immigrant to the US, and arrived with $32 in his pocket.  He founded Bardahl in the 1930s, so this is a very early can with the D-B name on it.  It is a Seattle, Washington company.  
 
It's in decent shape, the graphics are pretty clean overall.  
 
Take a look at the photos and description, if you have any questions or need any additional information before purchase, please let us know, we are happy to help.