Markings on the back side of the panel: a stamp of "MV" (Michiel Vriendt); brands for "A" as well as the city crest of Antwerp (Ertz 2008-10, p. 1028).
See the Rijksbureau voor Kunsthistorische Documentatie (RKD)
Although Ertz dated this work to ca. 1616 and considered it the prime version, the Mauritshuis's own investigation suggests that it is a slightly later copy of the Dexia Bank painting and they now suggest a date for this work of ca. 1621-22. I cannot see how an exact copy like this would have been made years after the original. The two must have been at least initiated at the same time, even if this version was not brought to completion until later when a buyer for it was found.
There is a further copy of this composition in the Prado which has been attributed to Jan the Younger but is probably a high-level studio work: Prado, #1414, Ertz as Jam the Younger #305, panel, 106 x 73. It would be worthwhile trying to untangle the relations between all three of these works.
The marks on the back indeed consists of the stamp 'MV' by Michiel Vriendt, an illegible and abraded Antwerp Brand and the letter 'A'. The latter I have identified as a year letter from the Guild year 1621-1622. This would be the year the panel was produced.
See J. Wadum: “The Antwerp Brand on Paintings on Panels”, in Looking Through Paintings. The Study of Painting Techniques and Materials in Support of Art Historical Research, ed. E. Hermens. Leids Kunsthistorisch Jaarboek XI. Baarn and London (1998) 179-198, and especially page 198.