David Slagger of Kenduskeag said he bought the print, which depicted downtown Bangor, from a TD Banknorth branch silent auction as a gift for his wife, the Bangor Daily News reported Tuesday.
However, Slagger said he took the item home and removed it from its frame to discover it was only part of a much larger document centered around the score for an 1835 piano composition called "Bangor March," written by blind composer Oliver J. Shaw.
"From a local perspective, I think it's priceless because this is a part of Bangor's history," Slagger said.
Bangor Museum and History Museum curator Dana Lippitt said the museum has only one intact copy of the march and several partial copies.
"I think they're fairly rare because paper gets deteriorated or torn," she said.
Copyright 2010 United Press International, Inc. (UPI).