Small aperture is first pattern. Aperture enlarged later.
Unit markings observed
NIAGARA FALLS
##

CY
##
(County of York?)

BofM
##
(Bank of Montreal?)

HG
60

TPF
##

HHGRA
(Hamilton HG Rifle Assoc)

UCC
(Upper Canadaicon College)

EC
##
(Essex County?)

US consul in Niagara Falls complained of aggressive patrolling by HG on border in 1914.
One seen in 14 and 15M range.
HG rifles did not have roundel , mark or serial # stamped on butt.