Thank you for a very interesting question! :)
According to the American Gold Exchange
Specifications: U.S. Morgan Silver Dollars
"Minted: 1878 - 1904, 1921
Designer:George T. Morgan
Composition: .900 silver/.100 copper
Net silver content: 0.77344 troy oz.
Size: 38.1 mm diameter equal to 1.5 inches"
In order to find the thickness I phoned several coin dealers and they
all measured at
2.4 mm equal to 0.09449 inch.
Morgan Dollar Coin Guide
"Designer: George Morgan
Weight: 26.73 grams
Composition: 0.900 Silver, 0.100 copper
Diameter: 38.1 mm
Minted at: Denver, San Francisco, Philadelphia, New Orleans, Carson
City (D, S, P, O, CC)
Net Weight: 0.77344 oz Pure Silver
Years Minted: 1878 to 1904 and 1921
Mint mark: Reverse below wreath
Notes: 116 dates and mint marks exist. Numerous varieties exist. There
are VAM numbers to differentiate these varieties. Carson City Dollars
are very desirable, as well as DMPL and PL Morgan dollars. Proof
dollars do exist, but start at $500 to $800 each and go up
significantly. This series of coins is exceptionally popular to
"Today, Morgan Silver Dollars are highly prized by both coin
collectors and investors alike.
These important pieces of U.S. history have become the most popular
and collectible of all America's old coins.
Morgan Silver Dollars were first minted in 1878 and the final Morgan
Silver Dollar was struck in 1921.
90% Silver, 100% History - Each Silver Dollar contains .77344 troy
ounces of pure silver mined in the California Gold Rush Days and later
in the Comstock Lode mines of Nevada made famous in the era of the
Bonanza TV series.
Silver Dollars are Big Coins - Morgan Silver Dollars are large silver
coins almost one and half inches in diameter. Their size displays
clearly all the fine details from the dates, the motto "In God We
Trust," right down to fine hairs on the head of Miss Liberty.
American Heritage Relived - No other rare coin in history symbolizes
our American heritage like the Morgan Silver Dollar series."
IS THE 1878 P 7/8TF REALLY 7 OVER 8 TAIL FEATHERS?
by Leroy C. Van Allen
Morgan Silver Dollars 1878-1921 Coin Guide
"Soon after production began, someone advised the Mint that the eagle
should have seven tail feathers, instead of the eight being shown, and
Linderman ordered this change. As a result, some 1878 Morgan dollars
have eight feathers, some seven-and some show seven over eight. The
seven-over-eight variety is the scarcest, though all are fairly
Morgan Silver dollar dimensions specifications
history of Morgan Silver Dollar
Plus, I phoned several well-known coin dealers in my area to determine