Irving Scheib entered the plea to a count of wire fraud in federal court in Manhattan on Thursday.
The government says the Bonsall, Calif., resident bought the glove on eBay for $750 in January. It says he then claimed the late "Father Knows Best" actor Robert Young had gotten the glove.
The government says Scheib is married to one of the actor's granddaughters.
Prosecutors say a buyer backed out after Scheib refused to notarize a letter. They say Scheib was caught after an investigator posed as a New York buyer.
The 50-year-old Scheib faces up to 20 years in prison on Oct. 30.
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