Three people from Brooklyn, N.Y., were charged Saturday with trying to buy an expensive watch with a stolen credit card.

Police were alerted by a passerby who told police he saw two of the suspects pacing in front of Lenox Jewelers, 2379 Black Rock Turnpike, and by the store manager herself.

Llona Undin, 35, tried to purchase a $20,150 Rolex using a credit card that had been stolen, according to the report. She said she wanted to buy the watch for her father.

Undin was charged with criminal attempt to commit first-degree larceny, conspiracy to commit first-degree larceny, criminal impersonation, second-degree forgery and illegal use of a credit card. She was held on a $25,000 bond for a Monday appearance at state Superior Court in Bridgeport.

George Meskhishville, 31, who police said drove Undin to the Black Rock Turnpike store, was charged with conspiracy to commit first-degree larceny, conspiracy to illegally use a credit card and credit card theft. He was also held on a $25,000 bond and scheduled to appear in go to court on Monday.

Richard Meskhishville, 37, a passenger in the car, also was scheduled to appear in court Monday. Police said they found 10 folds of heroin in his possession, and he was charged with two counts of possession of narcotics. His bond was set at $1,000.