What is the current retail value of an 1865 Japanese Trade Ddollar
graded  AU with trwo chop marks?

Most libraries have a copy of Krause "Standard Catalog of World
Coins," that would be a good place to start.  I have also heard that a
lot of counterfeit trade dollars have been made.

S

Several countries minted silver coins in the 19 century for trading
with China/ They were called Trade  Dollars.    The o ne OI am asking
about was minted =in Japanand was   called Japanese Trade Dollar. 
Coins for collection are graded by condition int the following
categories: VG?8 very good, F-12 is  fine, VF-20 very fine ,XF=40
extremely fine, AU-50 almost uncirculated and MS mint state 30 to 65  
   depending on the condition of the coin.  The coin I am asking about
is graded AU.  It also has two chopmarks which Chinese warlords
stamped on to guarantee the fineness of the silver.
The more scarce and more expensive the coin, the more likely the value
will be determined in  coi n auction.
The total coinage for U.S.Trade Dollars was 35,965,924, but only
3,055,638 Japanese Trade Dollars

Hi,  Japanese Trade Dollars (the real one) were made for distribution
only three years: 1875, 1876, and 1877.  They are all very, very rare
with the 1877 being the rarest.  They were made to compete with the US
Trade Dollar and even have the name "Trade Dollar" in English on the
reverse  (along with the weight and fineness).  Be care of fakes. 
Make sure that they weigh 420 grains (I forget what that is in grams).
 They are very beautiful.  A nice xf example (no cleaning) will run
$800 to $1000.  Ones with chopmarks (or gin marks) are valued less. 
Hope this helps.

keoj