Lost Item No.: 1084241 - John F Kennedy International Airport, New York, US

I think I left my Swiss Certina DS watch (rose gold & brown leather strap) in one of the trays at the searching area. I was on flight BA 112 to London Heathrow leaving at 6:30pm New York time. I estimate I passed through security at around 4:00pm. Please could you inform me what the process is for retrieving this lost item is. It would be possible for someone in New York to pick it up. I would be very grateful if you could reply at your earliest convenience. Sincerely Noah Gaudoin