Hi again 37patt,
Had a thought the W 4 may give a clue, possibly the Military District.
But, The Wellington Rifles are in District 1, Wentworth Regt. in District 2 and Winnipeg Rifles in District 10. No unit in District 4, nor District 11, comes close to the abbreviations.

Possibly the 4 11 could be the month and year if issue and the marks on the scabbard and frog refer to the manufacturer, which is more likely.