Look at the coin again the date is 1776-1976 and has no silver in it and is still only a dollar.
It contains exactly 0% silver.
A 1976 commemorative Montreal olympic coin weighs 48.6000 grams and is made of .925 silver. If you do a little bit of math, that works out to be 1.4454 troy ounces of silver per coin. The price of silver is constantly changing. Its value at this minute is $13.25 per ounce. In terms of silver value, a 1976 Montreal silver commemorative coin is worth $19.15.
The coin has 40% silver in it or .3161oz of pure silver.
Most of the time the silver quarter is part of a set and is rarely seen alone. It isn't really a rare coin and would sell for about $2 for silver scrap. Keep in mind though that most quarters dated 1976 are NOT silver and the only silver quarters made in 1976 are 40% silver and all have an "S" mintmark. However, the San Fransisco mint made copper-nickel quarters with an "S" mintmark also, so having an "S" mintmark does not mean the coin is silver, but a coin without an "S" mintmark is for sure not a silver 1976 quarter.
August 11, 2009 The 1976 Silver Eisenhower Bicentennial coin in uncirculated grades is valued from $10 to $70 depending upon the actual condition of the coin.
The U.S. one dollar coin minted in 1976 was an Eisenhower dollar dated 1779-1976. Most were clad coins but some were made with 40% silver.
The color is different. The silver is more reflective. If you cover the coin with a Kleenex you can barely see the CN coin but the silver one shows through.
Your coin is only plated silver. The US mint has never made silver pennies. Plating adds no extra value.
There are 4 Isle of Man 1976 Commemorative Crown coins. Two are silver, two are copper-nickel. The silver coins coins are 0.9250 silver, as close as you are likely to get to pure silver.
The 1776-1976 dollar was an Eisenhower dollar and the silver version has a current value from $14 to $325 depending upon the condition of the coin.
Try a coin dealer, they will likely buy it.