Air date: 2012-07-17

Runtime: 60 min

The Season 10 premiere investigates the history of an electric guitar to determine if Bob Dylan played it at the 1965 Newport Folk Festival. Also: possible Beatle autographs from 1964 Miami Beach; a $5 thrift-store find that may have a Frank Zappa link.

Air date: 2012-07-24

Runtime: 60 min

A matched set of Civil War-era pistols; a 78 rpm record from KKK Records that features the songs "The Bright Fiery Cross" and "The Jolly Old Klansman." Also: Eduardo Pagán attempts to prove that Motown bassist James Jamerson owned an Ampeg B-15 amp that the Rock and Roll Hall of Fame wants to display.

Air date: 2012-07-24

Runtime: 60 min

Country star Clint Black learns about an old book of wanted posters that he owns. Also: a chunk of molten metal that may be from a B-25 bomber that crashed into the Empire State Building in 1945; a 1950s-era slide that may be of pinup queen Bettie Page.

Air date: 2012-07-31

Runtime: 60 min

Whether two patches that feature a symbol of a bird dropping a bomb are from a World War II unit; if a neckpiece and leggings belonged to Chief Black Kettle, a Cheyenne leader; whether a President Lincoln-signed note is authentic. Also: A tattered piece of red fabric is linked to a pivotal moment in the U.S. Civil War.

Air date: 2012-08-07

Runtime: 60 min

Is this picture frame a piece from the Titanic, Lusitania or neither? Were these signs part of the scene in an early victory for Civil Rights? Did a Nazi spy buy these toy soldiers?

Air date: 2012-10-02

Runtime: 60 min

A North Vietnamese soldier's diary; Notebook with recipes for large volumes of liquor; ledger sheds light on how American Indian actors were treated in Hollywood.

Air date: 2012-10-09

Runtime: 60 min

World War I poster; a map of Valley Forge that George Washington may have used during the American Revolution; Transistor radio; business card may tie a man's father to Prohibition-era underworld crime.

Air date: 2013-04-02

Runtime: 60 min

A Kit Carson biography that may have belonged to his family members; a saddle linked to Hollywood stuntman Yakima Canutt; "Tumbling Tumbleweeds" sheet music with curious inscription; a basket that may have been woven by a pivotal player in the Modoc Indian wars.

Air date: 2013-01-08

Runtime: 60 min

A bill of sale for a 17-year-old black girl; powder horn; handwritten score helps make "Star-Spangled Banner" the national anthem; 1775 almanac.