Miniature Portrait of Philip

There have been substantial questions about the validity of the authorship of the 1624 portrait of Velazquez. The one at the Metropolitan Museum of Art has been claimed to have been created by Juan Batista Maino, the King's drawing master. The center of this topic is focused on a miniature painting located in a museum in Munich. The portrait shows Philip standing next to a woman where he looks notably young. It could have potentially have been created before Velazquez's 1624 painting. If this is true it could damage his monopoly over paintings Philip IV, modestly hurting his overall image as a great artist. However, a white collar called the golilla is on Philip's jacket, which he started wearing at around January 1623. Thus, this portrait could not have been painted before this time, so the window for an author to create an earlier portrait of Philip is small. Additionally, Velazquez could have also made these miniatures himself as there is some evidence that he used to create these. Therefore, miniature paintings of Philip IV could have been created earlier than Velazquez's 1624 painting by a different artist but there is not sufficient evidence of this as to date.