Current number of Masters of Wine. Over 450 people from 30 countries have become MWs since the first exam took place in 1953. MWs represent a broad diversity of professions from winemakers to wine consultants. There are three stages to the MW program, and the minimum time it takes to qualify is three years. The MW study program, offered by The Institute of Masters of Wine is now open for applications until May 29, 2020. Find details on the program and how to apply here.