I did a little searching and my best guess would be 1960s. I found a 1960s bottle that looked identical except at the bottom it was "ONE QUART" in red letters instead of LITRE. Likely yours is for the Canada or Europe market.
FYI - the bottle I referenced was here: http://www.worthpoint.com/worthopedi...scotch-whiskey
. If the link doesn't show, it was a site called worthpoint that shows previous ebay ****s.