[Hugh]

Here is a cover with a cancel from the Great Western Railway from February 20, 1867. It's on a cover that was travelling west to Windsor, Canada West [CW]. Canada West was created in 1840 following the Upper Canada Rebellion of 1837. Together with Canada East, it formed the Province of Canada -- a British Colony. The GWR was the first railway chartered in Canada West and operated between 1853 and 1882 when it became part of the Grand Trunk Railway.

Four months after this cover was mailed, on July 1, 1867, Canada West would become the Province of Ontario in the new Confederation of Canada.

Stamp:
Province of Canada
First Cents Issue - Beaver
Issued in July 1859
5c, Carmine
Unitrade 15

Sadly, the stamp was obliterated with a pen cancel. However, it's still a very nice, bright stamp. According to the dealer the cover was "found in Norway in May 2012 and had never been exposed to sunlight".  Such are the legends of provenance (smile).

Cancels:

Receiving
Great Western Railway
Partial Ring - Outside: G.W.R. / 6[7 - VERY faint]
Centre: WEST / FEB 20
Type  1606 (Jarett, p. 567)

Arrival
Single Ring - FEB 20 / 1867