Shoppers swarmed to Karen Walker's online site after the Duchess of Sussex took her first steps on New Zealand turf wearing the branded trench coat.
The New Zealand designed tailored coat with double-breasted front with a price tag of $975 was not available until mid-November but pre-sale orders were sold within a few hours of Meghan's debut.
Karen Walker communications manager Jiali Yang said 75 per cent of these orders would be shipped to the US, and the rest would go to the UK, Australia and within New Zealand.
Designer Karen Walker said this trench coat was one of the brand's most beloved silhouettes.
"It first appeared, in classic tan trench coating, in one of our shows at London Fashion Week in 2004. Since then we've refreshed and revisited it many times and it continues to be a favourite.