This months Feature is a brass printers plate and its original envelope .
The front of the envelope has been printed just as the cheques.
Cheques from the era were quite large and this one measures 4" X 9".
The most interesting feature to me is the name :
Canadian Oil Company ---- singular , not plural.
That alone dates it between 1904 and 1908 . It was printed for the
McCort Oil Co. branch , one of the original nine companies that joined to
 form the Canadian Oil Company in 1904. Even the date is pre-printed 190_ .

The shine of the brass makes it difficult to capture a nice image of the
printing plate but this will show that it is reverse printed .

The following is a brief history of  names and dates.

In 1901, in Petrolia, Ontario the Canadian Oil Refining Company was formed. Three years later, to
  consolidate their strengths, it merged with eight other small companies to form the Canadian Oil
 Company Limited of Petrolia. By 1907 this company was forced into bankruptcy and was
purchased by the National Refining Company of Cleveland. On December 4th, 1908, it received its
     new charter as the Canadian Oil Companies Limited.
 

 A detailed history can be found at
 Brief  Company History
    &
The White Rose Story