Lost Item No.: 1067432 - John F Kennedy International Airport, New York, US

My keys are on a small, thin black carabiner (teardrop shape) with a locking mechanism (screws closed). They have a silver-colored token on them that says "Kaisers" on one side in red print, slightly smaller than a quarter, which can be removed with a lobster-claw mechanism. There are three subrings of keys, one with one key, and the other two with three keys each. I arrived on Air Berlin flight 7248 from Berlin (TXL) on Saturday, 23 April. The keys may have fallen out of my pocket on the flight or somewhere in the airport (customs, women's bathroom, baggage claim, etc.)