Notably, there is a multi-page section in the back that says 'actual value of US Gold, Silver, Copper, Bronze and Nickel Coins'. Below that heading points out that the prices are based on auction results compiled by the authors between Jan. and July 1883. Here are some examples quoted:
"Gold Double Eagles"
"1849: Only one coin known to exist, which still remains in the coin cabinet o the US Mint in Philadelphia. This unique piece stamps, therefore, all other double eagles with the date 1849 as base imitations.
1850: a sharp, uncirculated impression sold at $26
1851 - 1870: uncirculated issues, worth $22 to $25
1871 - 1882: Proofs, $23 - $25; uncirculated $21 to $22.50
1883: Brillant Proof, $20.50 - $21.00"
note: it goes on to distinguish between 'brillant proof' and 'proof' in gold coins. The former "exhibit a burnished, mirror-like, reflecting surface", while the latter coins are "former brillant proof coins that are soiled or tarnished"
"Gold Eagles - Uncirculated condition"
" 1795: $15.75
1796: $ 20.00
1797: $ 16.50" etc, etc.
"Gold Half Eagles"
"The gold Half Eagle of 1815 is the rarest coin of the United States series. Only about three genuine specimens are known. One coin is now in the cabinet of Mr. Garrett, in Baltimore, for which he paid, June 26, 1883, $400.00. The second one is at present in a museum in Europe, and the third is supposed to be in the collection of the King of Sweden. An 1815 Half Eagle in the collection of Col. Adams is generally considered of very doubtful parentage."
The book goes on to details the other gold issues, all of the US silver dollars up to 1883, and the rest of the coinage produced up to that point.
I'll be happy to look up the 'actual values' for anyone's coin if they would like, just let me know the type and year. Overall, this is a pretty cool book, and a window into the souls of the early US coin collectors.
Doug