Open-house jewel thief

It’s open season on Upper East Side open houses.

A dapper jewel thief has stolen about $40,000 worth of bling during showings at three luxury residences for sale in the posh neighborhood, law-enforcement sources told The Post.

The crook swiped $10,000 worth of cuff links from a sixth-floor $4 million co-op on Lexington Avenue between 67th and 68th streets on April 19, sources said.

Two days later, a pair of earrings and a bracelet worth about $7,000 were swiped during an open house at a co-op on East 96th between Madison and Park Avenue.

Three days later, a watch, ring, and bracelets totaling $23,000 were taken during the showing of an East 94th Street town house on the market for nearly $7 million.

Area real-estate brokers are desperate for police to catch the bandit.

“It’s a very scary situation,” said top broker Michele Kleier, who stars in HGTV’s “Selling New York” with her daughters.

Kleier, who has two new Upper East Side listings, said she brings her assistant to every open house to screen potential buyers.