two Rembrandt paintings on a Herringbone canvas...but not the same textile...
In this above publication I found that Rembrandt painted 'The Syndics' and 'The Conspiracy of the Batavians under Claudius Civilis' on a herringbone canvas, but that each canvas has a different repeat in the pattern; 16 and 24 threads.
Benjamin Binstock (1)writes that both paintings are from the same canvas.
Much to be discovered, hopefully on more recent x-ray images!
(1) Seeing Representations;or, The Hidden Masters in Rembrandt's Syndics.
Benjamin Binstock; Representations Vol.83.No1 (Summer 2003) pp 1-37