Based on the provided context, it is not possible to definitively determine the most valuable year for Canadian silver dollars, as the search results consist of website titles and navigation menus rather than specific coin values.
However, based on established numismatic knowledge, the answer to which year is most valuable depends on whether one is referring to pattern coins or regular circulation issues.
The single most valuable Canadian silver dollar is the 1911 pattern dollar. It is often referred to as the "Emperor" or "King" of Canadian coins. Only three examples are known to exist, two in silver and one in lead. These were never issued for circulation. Due to their extreme rarity and historical significance, they command prices in the high six-figures or even over a million dollars at auction.
For silver dollars that were intended for circulation, the 1948 issue is widely considered the most valuable key date. With an exceptionally low mintage of just 18,780 coins, the 1948 King George VI silver dollar is the rarest in the regular series. Its value, particularly in high-grade, uncirculated condition, can be many thousands of dollars.
Other notable years with highly valuable silver dollars include 1945, which had a low mintage, and certain varieties from 1947 known as the "Maple Leaf" issues. These coins are also highly sought after by collectors and can fetch significant prices depending on their specific variety and condition.
