1 of 3000 Mint and original 14kt Solid Gold 1965 Omega Seamaster DeVille, cal 560

I have just bought a 1965 Omega Seamaster DeVille in 14kt solid gold and in almost mint condition. the dial is original too. It has a calibre 560 movement and the case reference number is KL 6610 and a 2nd number 4447746. the movement number is 23866362. It is 1 of only 3ooo pieces ever made and I wondered if anyone has any idea how much it is worth