At 10 o'clock one morning fortnight ago a man in a black Dodge sedan drove up to the Warner-Quinlan filling station on Manhattan's Lexington Avenue at 127th Street. Day Manager Walter Lyle filled his tank with five gallons of gasoline worth 98¢. The man gave him a $10 gold certificate.
"You don't see many of these anymore," said Lyle.
"Ah, yes, you do." said his customer. "I've got a hundred of them left at home." He took his change and drove off.
Following his company's instructions to be on the lookout for counterfeit gold bills or...