The watches are advertised as "boutique grade" - fakes which are of such high quality, even dealers have trouble telling them apart from the real thing.
The replicas of luxury timepieces from the likes of Audemars Piguet, Panerai and Rolex come in official-looking boxes, complete with warranty cards and papers.
And there is a booming trade in them online.
The Sunday Times has found at least four Facebook pages through which these counterfeits are being sold for between $500 and $1,500, depending on the model.
