It's the mystery of the missing Grange - how $5 million worth of Australia's prestige wines has vanished without a trace amid the wreckage of a liquidated Hunter wine empire.

It's the question former James Estate Wines boss David James can't answer as the ANZ Bank chases him for more than $11 million.

And collectors who trusted him with their Granges, Henschkes and Torbrecks ask where their wine has gone.

The NSW Police Force's Fraud and Cybercrime Squad has appealed to the public after launching Strike Force Farrington in March to find the missing wine collections.