Wolseley 25 on the back of a playing card, c.1948?

From what I presume was a promotional pack of cards, although the advertising is subtle - this image appears on the back of each card and on the box but there is no wording. Found in the drawer of my grandparents' card table and presumably associated with my grandfather's garage business. Although he was never a Wolseley agent, handling Austins, Citroëns and Singers, he did (in a manner that I suppose would be impossible now) obtain cars of other makes for friends and acquaintances, and himself drove Rovers at least from the 1950s onwards, so perhaps the playing cards came his way as a result of purchasing a car for a friend, or maybe he even considered a Wolseley for himself. The date is a guess - the Wolseley 25 was introduced in 1936 as an up-market version of the equivalent 6-cylinder Morris and was relaunched after the war only briefly, but the pose here is very similar to an advert reproduced on the 1948 page of the Classic Car Catalogue, even though the art-work is not quite the same; the original oil painting is held by the British Motor Industry Heritage Trust, which dates it to the 1940s.