Hi there, sorry I can't confirm whether they were still in production in the 1970s but I have seen items with confirmed dates as early as 1919 and definitely some that seem to be 1960s at least.
Anything minted in the 1970s is made of copper-nickel, not silver, and is only worth face value.
All silver dollars made of silver contain 90% silver, but the last of those was minted in 1935. The Eisenhower dollars of the 1970s didn't contain silver.
Assuming it's a standard circulation coin, it has no silver. France ended the use of silver for circulating coinage in the early 1970s.
The Silver Convention were a group that produced music in the disco genre when it was really popular in the 1970s. They were originally called the Silver Bird Convention and then the Silver Bird.
Ultraman
Yes. Silver dollars minted in 1935 and earlier weigh 26.73 grams, as they contain 90% silver. The large Eisenhower dollars of the 1970s are mostly copper with no silver and weigh 22.68 grams.
Dwight D. Eisenhower was on the large dollar coin minted in the 1970s.
1935 for circulating dollars. Then in the 1970s, some Eisenhower dollars contained silver, but those were only for the collector market.
All true silver dollars show a woman personifying liberty. Though in the 1970s the mint made a coin the same size as the old silver dollars featuring Eisenhower on the obverse but those coins intended for circulation contain no silver.
A US Silver dollar weighs 26.73 grams. Of that, 90% is silver and 10% is copper. Note: those numbers don't apply to Eisenhower dollars from the 1970s, which are mostly copper with a bit of nickel.
1970 for halves, 1935 for dollars (not counting a few silver Eisenhower dollars in the 1970s, which were for collector release only, instead of circulation).
If it was minted in or before 1935, it's 90% silver out of a total weight of 26.73 grams. If it's a circulating Eisenhower dollar from the 1970s, then it contains no silver at all.