What is the value of a 1939 nickel with no mint mark?
Prior to 1979/80, coins struck at Philadelphia didn't carry mint marks*, so your nickel comes from that mint. Please see the Related Question for value information.
(*) So-called "war nickels" bore the P mint mark from 1942 to 1945. The first coin to regularly carry a P was the 1979 SBA dollar. The next year, all other denominations except the cent were also given P mint marks.
July 25, 2009 The value of a circulated Jefferson war nickel is based mainly upon the value of the silver they contain which is $0.78 today. In uncirculated collector coins the values vary greatly with the year and mint mark. To establish an estimated value for an uncirculated Jefferson war nickel, the year and mint mark must be known.
1976, Kennedy Bicentennial Half Dollar; with no mint mark, copper-nickel clad, uncirculated-$1.25 with D mint mark, copper-nickel clad, uncirculated-$1.25 with S mint mark, copper-nickel clad, proof-$1.75 with S mint mark, silver clad, uncirculated-$4.00, proof-$5.00 There were so many hundreds of millions of these minted that if your coin has been in circulation, it has no added value and probably never will.