Its history is that it was printed by a novelty company. They cost a couple of dollars and are used as joke items, a lot like the "$3" bills that are printed by the same companies. The US never printed a real million-dollar bill; the highest circulating denomination was $10,000 and the largest bills ever printed were special $100,000 gold certificates used for intra-governmental transactions.
It depends on the coin's condition and mint mark. Without that information the best I can do is point you to a site (among many) that gives a range of prices. http://www.numismedia.com/fmv/prices/mrcdim/pricesgd.shtml
The U.S. did not issue any $100 bills with that date. If it's from a private bank or another country, please post a new question with that information to help ID the bill. Thanks!
The best thing to do is send it to a third party grading service. They will grade the coin for a fee. This will give you an accurate grade of the coin. You can also take it to a coin collector or use a free online guide like PCGS.
M represents 1000, X is 10 and C is 100. This would convert to MCMXXIII.
The 1923 Peace Dollar contains 90% silver and 10% copper.
Please see the Related Questions
It's actually called a Peace dollar. Its value is around $14 to $16 for its silver content.
Please post a new question. All 1923 silver dollars carried a picture of Miss Liberty.
Value depends on if it's a Walking Liberty half dollar or a Monroe Doctrine half dollar, both are dated 1923 and both have "S" mintmarks.
Your 1923 Liberty Dollar is actually a 1923 PEACE dollar. This series of silver dollars were made from 1921 to 1928 & 1934 to 1935 at 3 US Mints. The 1923 date is very common regardless of any mintmarks. Assuming the coin is circulated, retail values are $31.00-$37.00.
A 1923 silver dollar weighs about 26.73 grams.
The image on the 1923 Peace Dollar is that of Lady Liberty.
With a mintage of 30,800,000 a 1923 Peace Dollar is not rare or scarce. Retail values are $16.00-$20.00 for circulated coins and uncirculated start at $22.00+
This coin is so common regardless of any mintmarks a circulated example is only $23.00-$30.00
You're describing a 1923 US Peace dollar, called that because it was struck to commemorate the end of WWI. There's more information at the question "What is the value of a 1923 US silver dollar?"
1923 Peace dollars in circulated condition are rather common and are worth $23 in silver content. Coin in uncirculated condition, however, are worth more. But in average condition it is worth about $23 for the silver in it. 1923 Peace Dollars are about the most common date of the series.