The Big Apple New York by de Kooning attracted huge attention with bidders from 15 countries online at one stage.
The painting saw a flurry of 127 bids before being eventually knocked down to an Irish bidder for €75,000.
The underbidder was in Norway.
The Irish bidder was acting on behalf of a client.
The seller was also Irish. The painting had been in a private collection in Co Wexford.
The Dutch-American artist Willem de Kooning was an Abstract Expressionist and part of the New York School.
His contemporaries included such luminaries as Jackson Pollock, Clyfford Still, Mark Rothko and Franz Kline. All are rightly celebrated in the US and internationally.
There was a large-scale retrospective of de Kooning at the Museum of Modern Art in New York in 2011-12.
Skibbereen-based Morgan O’Driscoll runs regular auctions in Cork and Dublin and holds about six online auctions of Irish art every year.
This is by far the most expensive lot he has sold online.