IIRC - In 1958, the CN Dollar was worth about $1.07 U.S.

I remember U.S. Gun Magazine advertisements for the "Commonwealth of Australiaicon" - Martini cadet rifles in the 1960s. $12.00 (USD) for unaltered riles in .310 Cadet, sounds familiar. The importers 'Altered Rifles', to .32-20 and .357 Magnum, and priced these a few dollars higher.