The feds may be close to putting a cork in their year-long probe of iconic wine shop Sherry-Lehmann — and potentially bringing charges against its former owners for allegedly scamming customers out of their vintage bottles, The Post has learned.

Agents from the FBI and the US Postal Inspection Service interviewed several former employees over the past few weeks ahead of a grand jury hearing that was scheduled for last Thursday, ex-workers with direct knowledge of the investigation told the Post.

Those interviewed were asked about the company’s alleged practice of offering wines for sale that the shop didn’t have in stock and would not be able to acquire, one person with knowledge of the agents’ questions told The Post.