They are offered with a starting price of €150,000 at Abalarte on December 9-10 in Madrid.
The 3ft 6in x 9in (1.07m x 84cm) oils on canvas, which date from around 1712, depict Felipe V and Maria Luisa of Savoy dressed for the hunt and compare to a pair of paintings of similar subjects in the Cerralbo Museum in Madrid.
Further previews of forthcoming auctions in Spain and Portugal appear in this week's ATG print publication as part of our seven-page feature on Iberia.
