Looks like it is a 3a or 3b action rather than the typical side safety Jeffery style Farquharson.
A Farq in 375 Flanged would be a really useful rifle in N.A..
Can we see some more pictures of it?
Also, I have a few boxes of Westley Richards retailed 375 Flanged magnum I would sell but am not sure of the process getting it to Canada if you are interested.